diff --git a/backend/api/package.json b/backend/api/package.json
index 188f8dc..3054163 100644
--- a/backend/api/package.json
+++ b/backend/api/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@compass/api",
   "description": "Backend API endpoints",
-  "version": "1.5.1",
+  "version": "1.6.0",
   "private": true,
   "scripts": {
     "watch:serve": "tsx watch src/serve.ts",
diff --git a/backend/api/src/get-profiles.ts b/backend/api/src/get-profiles.ts
index b1ff001..f33a03c 100644
--- a/backend/api/src/get-profiles.ts
+++ b/backend/api/src/get-profiles.ts
@@ -17,6 +17,16 @@ export type profileQueryType = {
   pref_age_max?: number | undefined,
   drinks_min?: number | undefined,
   drinks_max?: number | undefined,
+  big5_openness_min?: number | undefined,
+  big5_openness_max?: number | undefined,
+  big5_conscientiousness_min?: number | undefined,
+  big5_conscientiousness_max?: number | undefined,
+  big5_extraversion_min?: number | undefined,
+  big5_extraversion_max?: number | undefined,
+  big5_agreeableness_min?: number | undefined,
+  big5_agreeableness_max?: number | undefined,
+  big5_neuroticism_min?: number | undefined,
+  big5_neuroticism_max?: number | undefined,
   pref_relation_styles?: string[] | undefined,
   pref_romantic_styles?: string[] | undefined,
   diet?: string[] | undefined,
@@ -60,6 +70,16 @@ export const loadProfiles = async (props: profileQueryType) => {
     pref_age_max,
     drinks_min,
     drinks_max,
+    big5_openness_min,
+    big5_openness_max,
+    big5_conscientiousness_min,
+    big5_conscientiousness_max,
+    big5_extraversion_min,
+    big5_extraversion_max,
+    big5_agreeableness_min,
+    big5_agreeableness_max,
+    big5_neuroticism_min,
+    big5_neuroticism_max,
     pref_relation_styles,
     pref_romantic_styles,
     diet,
@@ -211,6 +231,42 @@ export const loadProfiles = async (props: profileQueryType) => {
     drinks_max &&
     where(`drinks_per_month <= $(drinks_max) or drinks_per_month is null`, {drinks_max}),
 
+    big5_openness_min &&
+    where(`big5_openness >= $(big5_openness_min) or big5_openness is null`, {big5_openness_min}),
+
+    big5_openness_max &&
+    where(`big5_openness <= $(big5_openness_max) or big5_openness is null`, {big5_openness_max}),
+
+    big5_conscientiousness_min &&
+    where(
+      `big5_conscientiousness >= $(big5_conscientiousness_min) or big5_conscientiousness is null`,
+      {big5_conscientiousness_min}
+    ),
+
+    big5_conscientiousness_max &&
+    where(
+      `big5_conscientiousness <= $(big5_conscientiousness_max) or big5_conscientiousness is null`,
+      {big5_conscientiousness_max}
+    ),
+
+    big5_extraversion_min &&
+    where(`big5_extraversion >= $(big5_extraversion_min) or big5_extraversion is null`, {big5_extraversion_min}),
+
+    big5_extraversion_max &&
+    where(`big5_extraversion <= $(big5_extraversion_max) or big5_extraversion is null`, {big5_extraversion_max}),
+
+    big5_agreeableness_min &&
+    where(`big5_agreeableness >= $(big5_agreeableness_min) or big5_agreeableness is null`, {big5_agreeableness_min}),
+
+    big5_agreeableness_max &&
+    where(`big5_agreeableness <= $(big5_agreeableness_max) or big5_agreeableness is null`, {big5_agreeableness_max}),
+
+    big5_neuroticism_min &&
+    where(`big5_neuroticism >= $(big5_neuroticism_min) or big5_neuroticism is null`, {big5_neuroticism_min}),
+
+    big5_neuroticism_max &&
+    where(`big5_neuroticism <= $(big5_neuroticism_max) or big5_neuroticism is null`, {big5_neuroticism_max}),
+
     pref_relation_styles?.length &&
     where(
       `pref_relation_styles IS NULL OR pref_relation_styles = '{}' OR pref_relation_styles && $(pref_relation_styles)`,
diff --git a/backend/email/emails/functions/mock.ts b/backend/email/emails/functions/mock.ts
index b863c3d..a3154ac 100644
--- a/backend/email/emails/functions/mock.ts
+++ b/backend/email/emails/functions/mock.ts
@@ -113,6 +113,11 @@ export const sinclairProfile: ProfileRow = {
   search_text: 'the futa in futarchy',
   search_tsv: 'the futa in futarchy',
   age: 25,
+  big5_agreeableness: 10,
+  big5_openness: 10,
+  big5_conscientiousness: 10,
+  big5_extraversion: 10,
+  big5_neuroticism: 10,
 }
 
 export const jamesUser: User = {
@@ -226,4 +231,9 @@ export const jamesProfile: ProfileRow = {
   search_text: 'the futa in futarchy',
   search_tsv: 'the futa in futarchy',
   age: 32,
+  big5_agreeableness: 10,
+  big5_openness: 10,
+  big5_conscientiousness: 10,
+  big5_extraversion: 10,
+  big5_neuroticism: 10,
 }
diff --git a/backend/supabase/migrations/20260213_add_big_5_to_profiles.sql b/backend/supabase/migrations/20260213_add_big_5_to_profiles.sql
new file mode 100644
index 0000000..1d2321b
--- /dev/null
+++ b/backend/supabase/migrations/20260213_add_big_5_to_profiles.sql
@@ -0,0 +1,23 @@
+ALTER TABLE profiles
+    ADD COLUMN big5_openness          SMALLINT,
+    ADD COLUMN big5_conscientiousness SMALLINT,
+    ADD COLUMN big5_extraversion      SMALLINT,
+    ADD COLUMN big5_agreeableness     SMALLINT,
+    ADD COLUMN big5_neuroticism       SMALLINT;
+
+
+ALTER TABLE profiles
+    ADD CONSTRAINT big5_range_check
+        CHECK (
+            big5_openness BETWEEN 0 AND 100 AND
+            big5_conscientiousness BETWEEN 0 AND 100 AND
+            big5_extraversion BETWEEN 0 AND 100 AND
+            big5_agreeableness BETWEEN 0 AND 100 AND
+            big5_neuroticism BETWEEN 0 AND 100
+            );
+
+CREATE INDEX profiles_big5_open_idx ON profiles (big5_openness);
+CREATE INDEX profiles_big5_cons_idx ON profiles (big5_conscientiousness);
+CREATE INDEX profiles_big5_extra_idx ON profiles (big5_extraversion);
+CREATE INDEX profiles_big5_agree_idx ON profiles (big5_agreeableness);
+CREATE INDEX profiles_big5_neur_idx ON profiles (big5_neuroticism);
diff --git a/common/src/api/schema.ts b/common/src/api/schema.ts
index 616e7ba..aeed446 100644
--- a/common/src/api/schema.ts
+++ b/common/src/api/schema.ts
@@ -509,6 +509,16 @@ export const API = (_apiTypeCheck = {
         pref_age_max: z.coerce.number().optional(),
         drinks_min: z.coerce.number().optional(),
         drinks_max: z.coerce.number().optional(),
+        big5_openness_min: z.coerce.number().optional(),
+        big5_openness_max: z.coerce.number().optional(),
+        big5_conscientiousness_min: z.coerce.number().optional(),
+        big5_conscientiousness_max: z.coerce.number().optional(),
+        big5_extraversion_min: z.coerce.number().optional(),
+        big5_extraversion_max: z.coerce.number().optional(),
+        big5_agreeableness_min: z.coerce.number().optional(),
+        big5_agreeableness_max: z.coerce.number().optional(),
+        big5_neuroticism_min: z.coerce.number().optional(),
+        big5_neuroticism_max: z.coerce.number().optional(),
         religion: arraybeSchema.optional(),
         pref_relation_styles: arraybeSchema.optional(),
         pref_romantic_styles: arraybeSchema.optional(),
diff --git a/common/src/api/zod-types.ts b/common/src/api/zod-types.ts
index 42de723..8b62e09 100644
--- a/common/src/api/zod-types.ts
+++ b/common/src/api/zod-types.ts
@@ -56,6 +56,7 @@ export const baseProfilesSchema = z.object({
   country: z.string().optional().nullable(),
   gender: genderType,
   geodb_city_id: z.string().optional().nullable(),
+  languages: z.array(z.string()).optional().nullable(),
   looking_for_matches: zBoolean,
   photo_urls: z.array(z.string()).nullable(),
   pinned_url: z.string(),
@@ -67,13 +68,18 @@ export const baseProfilesSchema = z.object({
   region_code: z.string().optional().nullable(),
   visibility: z.union([z.literal('public'), z.literal('member')]),
   wants_kids_strength: z.number().nullable(),
-  languages: z.array(z.string()).optional().nullable(),
 })
 
 const optionalProfilesSchema = z.object({
   avatar_url: z.string().optional().nullable(),
   bio: contentSchema.optional().nullable(),
+  big5_openness: z.number().min(0).max(100).optional().nullable(),
+  big5_conscientiousness: z.number().min(0).max(100).optional().nullable(),
+  big5_extraversion: z.number().min(0).max(100).optional().nullable(),
+  big5_agreeableness: z.number().min(0).max(100).optional().nullable(),
+  big5_neuroticism: z.number().min(0).max(100).optional().nullable(),
   born_in_location: z.string().optional().nullable(),
+  causes: z.array(z.string()).optional().nullable(),
   comments_enabled: zBoolean.optional(),
   company: z.string().optional().nullable(),
   diet: z.array(z.string()).optional().nullable(),
@@ -82,29 +88,27 @@ const optionalProfilesSchema = z.object({
   drinks_min: z.number().min(0).optional().nullable(),
   drinks_per_month: z.number().min(0).optional().nullable(),
   education_level: z.string().optional().nullable(),
-  mbti: z.string().optional().nullable(),
   ethnicity: z.array(z.string()).optional().nullable(),
   has_kids: z.number().min(0).optional().nullable(),
   has_pets: zBoolean.optional().nullable(),
   height_in_inches: z.number().optional().nullable(),
+  image_descriptions: z.any().optional().nullable(),
+  interests: z.array(z.string()).optional().nullable(),
   is_smoker: zBoolean.optional().nullable(),
+  mbti: z.string().optional().nullable(),
   occupation: z.string().optional().nullable(),
   occupation_title: z.string().optional().nullable(),
   political_beliefs: z.array(z.string()).optional().nullable(),
-  interests: z.array(z.string()).optional().nullable(),
-  work: z.array(z.string()).optional().nullable(),
-  causes: z.array(z.string()).optional().nullable(),
-  relationship_status: z.array(z.string()).optional().nullable(),
   political_details: z.string().optional().nullable(),
   pref_romantic_styles: z.array(z.string()).nullable(),
+  relationship_status: z.array(z.string()).optional().nullable(),
   religion: z.array(z.string()).optional().nullable(),
   religious_belief_strength: z.number().optional().nullable(),
   religious_beliefs: z.string().optional().nullable(),
   twitter: z.string().optional().nullable(),
   university: z.string().optional().nullable(),
   website: z.string().optional().nullable(),
-  image_descriptions: z.any().optional().nullable(),
+  work: z.array(z.string()).optional().nullable(),
 })
 
-export const combinedProfileSchema =
-  baseProfilesSchema.merge(optionalProfilesSchema)
+export const combinedProfileSchema = baseProfilesSchema.merge(optionalProfilesSchema)
diff --git a/common/src/filters.ts b/common/src/filters.ts
index c75c037..c7fec93 100644
--- a/common/src/filters.ts
+++ b/common/src/filters.ts
@@ -22,6 +22,17 @@ export type FilterFields = {
   shortBio: boolean | undefined
   drinks_min: number | undefined
   drinks_max: number | undefined
+  // Big Five personality filters (0-100 range)
+  big5_openness_min: number | undefined
+  big5_openness_max: number | undefined
+  big5_conscientiousness_min: number | undefined
+  big5_conscientiousness_max: number | undefined
+  big5_extraversion_min: number | undefined
+  big5_extraversion_max: number | undefined
+  big5_agreeableness_min: number | undefined
+  big5_agreeableness_max: number | undefined
+  big5_neuroticism_min: number | undefined
+  big5_neuroticism_max: number | undefined
 } & {
   [K in OptionTableKey]: string[]
 }
@@ -89,6 +100,16 @@ export const initialFilters: Partial<FilterFields> = {
   shortBio: undefined,
   drinks_min: undefined,
   drinks_max: undefined,
+  big5_openness_min: undefined,
+  big5_openness_max: undefined,
+  big5_conscientiousness_min: undefined,
+  big5_conscientiousness_max: undefined,
+  big5_extraversion_min: undefined,
+  big5_extraversion_max: undefined,
+  big5_agreeableness_min: undefined,
+  big5_agreeableness_max: undefined,
+  big5_neuroticism_min: undefined,
+  big5_neuroticism_max: undefined,
   orderBy: 'created_time',
 }
 
diff --git a/common/src/supabase/schema.ts b/common/src/supabase/schema.ts
index d5507e1..4890028 100644
--- a/common/src/supabase/schema.ts
+++ b/common/src/supabase/schema.ts
@@ -856,6 +856,11 @@ export type Database = {
       profiles: {
         Row: {
           age: number | null
+          big5_agreeableness: number | null
+          big5_conscientiousness: number | null
+          big5_extraversion: number | null
+          big5_neuroticism: number | null
+          big5_openness: number | null
           bio: Json | null
           bio_length: number | null
           bio_text: string | null
@@ -913,6 +918,11 @@ export type Database = {
         }
         Insert: {
           age?: number | null
+          big5_agreeableness?: number | null
+          big5_conscientiousness?: number | null
+          big5_extraversion?: number | null
+          big5_neuroticism?: number | null
+          big5_openness?: number | null
           bio?: Json | null
           bio_length?: number | null
           bio_text?: string | null
@@ -970,6 +980,11 @@ export type Database = {
         }
         Update: {
           age?: number | null
+          big5_agreeableness?: number | null
+          big5_conscientiousness?: number | null
+          big5_extraversion?: number | null
+          big5_neuroticism?: number | null
+          big5_openness?: number | null
           bio?: Json | null
           bio_length?: number | null
           bio_text?: string | null
@@ -1204,7 +1219,15 @@ export type Database = {
           ts?: string
           user_id?: string | null
         }
-        Relationships: []
+        Relationships: [
+          {
+            foreignKeyName: 'user_events_user_id_fkey'
+            columns: ['user_id']
+            isOneToOne: false
+            referencedRelation: 'users'
+            referencedColumns: ['id']
+          },
+        ]
       }
       user_notifications: {
         Row: {
diff --git a/web/components/filters/big5-filter.tsx b/web/components/filters/big5-filter.tsx
new file mode 100644
index 0000000..e3cd262
--- /dev/null
+++ b/web/components/filters/big5-filter.tsx
@@ -0,0 +1,181 @@
+import clsx from 'clsx'
+import {RangeSlider} from 'web/components/widgets/slider'
+import {FilterFields} from 'common/filters'
+import {useT} from 'web/lib/locale'
+
+export const BIG5_MIN = 0
+export const BIG5_MAX = 100
+
+export type Big5Key =
+  | 'big5_openness'
+  | 'big5_conscientiousness'
+  | 'big5_extraversion'
+  | 'big5_agreeableness'
+  | 'big5_neuroticism'
+
+export type Big5MinMaxKey =
+  | 'big5_openness_min'
+  | 'big5_openness_max'
+  | 'big5_conscientiousness_min'
+  | 'big5_conscientiousness_max'
+  | 'big5_extraversion_min'
+  | 'big5_extraversion_max'
+  | 'big5_agreeableness_min'
+  | 'big5_agreeableness_max'
+  | 'big5_neuroticism_min'
+  | 'big5_neuroticism_max'
+
+export function hasAnyBig5Filter(filters: Partial<FilterFields>) {
+  return (
+    filters.big5_openness_min != null ||
+    filters.big5_openness_max != null ||
+    filters.big5_conscientiousness_min != null ||
+    filters.big5_conscientiousness_max != null ||
+    filters.big5_extraversion_min != null ||
+    filters.big5_extraversion_max != null ||
+    filters.big5_agreeableness_min != null ||
+    filters.big5_agreeableness_max != null ||
+    filters.big5_neuroticism_min != null ||
+    filters.big5_neuroticism_max != null
+  )
+}
+
+export function Big5FilterText(props: {
+  filters: Partial<FilterFields>
+  highlightedClass?: string
+}) {
+  const {filters, highlightedClass} = props
+  const t = useT()
+  const hasAny = hasAnyBig5Filter(filters)
+
+  if (!hasAny) {
+    return (
+      <span className={clsx(!hasAny && 'text-ink-600')}>
+        {t('filter.big5.any', 'Any Big 5')}
+      </span>
+    )
+  }
+
+  return (
+    <span className={clsx('font-semibold', highlightedClass)}>
+      {t('filter.big5.custom', 'Custom Big 5')}
+    </span>
+  )
+}
+
+export function Big5SliderRow(props: {
+  label: string
+  minValue: number | null | undefined
+  maxValue: number | null | undefined
+  onChange: (min: number | undefined, max: number | undefined) => void
+}) {
+  const {label, minValue, maxValue, onChange} = props
+
+  return (
+    <div className="mb-4">
+      <div className="mb-1 flex items-center justify-between text-sm text-ink-600">
+        <span>{label}</span>
+        <span className="font-semibold text-ink-700">
+          {minValue == null && maxValue == null
+            ? '0 – 100'
+            : `${minValue ?? BIG5_MIN} – ${maxValue ?? BIG5_MAX}`}
+        </span>
+      </div>
+      <RangeSlider
+        lowValue={minValue ?? BIG5_MIN}
+        highValue={maxValue ?? BIG5_MAX}
+        min={BIG5_MIN}
+        max={BIG5_MAX}
+        setValues={(low, high) => {
+          onChange(
+            low > BIG5_MIN ? Math.round(low) : undefined,
+            high < BIG5_MAX ? Math.round(high) : undefined
+          )
+        }}
+        marks={[
+          {value: 0, label: '0'},
+          {value: 25, label: '25'},
+          {value: 50, label: '50'},
+          {value: 75, label: '75'},
+          {value: 100, label: '100'},
+        ].map((m) => ({
+          value: ((m.value - BIG5_MIN) / (BIG5_MAX - BIG5_MIN)) * 100,
+          label: m.label,
+        }))}
+      />
+    </div>
+  )
+}
+
+export function Big5Filters(props: {
+  filters: Partial<FilterFields>
+  updateFilter: (newState: Partial<FilterFields>) => void
+}) {
+  const {filters, updateFilter} = props
+  const t = useT()
+
+  return (
+    <div className="w-full max-w-md py-2">
+      <Big5SliderRow
+        label={t('profile.big5_openness', 'Openness')}
+        minValue={filters.big5_openness_min}
+        maxValue={filters.big5_openness_max}
+        onChange={(min, max) =>
+          updateFilter({
+            big5_openness_min: min,
+            big5_openness_max: max,
+          })
+        }
+      />
+      <Big5SliderRow
+        label={t(
+          'profile.big5_conscientiousness',
+          'Conscientiousness'
+        )}
+        minValue={filters.big5_conscientiousness_min}
+        maxValue={filters.big5_conscientiousness_max}
+        onChange={(min, max) =>
+          updateFilter({
+            big5_conscientiousness_min: min,
+            big5_conscientiousness_max: max,
+          })
+        }
+      />
+      <Big5SliderRow
+        label={t('profile.big5_extraversion', 'Extraversion')}
+        minValue={filters.big5_extraversion_min}
+        maxValue={filters.big5_extraversion_max}
+        onChange={(min, max) =>
+          updateFilter({
+            big5_extraversion_min: min,
+            big5_extraversion_max: max,
+          })
+        }
+      />
+      <Big5SliderRow
+        label={t('profile.big5_agreeableness', 'Agreeableness')}
+        minValue={filters.big5_agreeableness_min}
+        maxValue={filters.big5_agreeableness_max}
+        onChange={(min, max) =>
+          updateFilter({
+            big5_agreeableness_min: min,
+            big5_agreeableness_max: max,
+          })
+        }
+      />
+      <Big5SliderRow
+        label={t('profile.big5_neuroticism', 'Neuroticism')}
+        minValue={filters.big5_neuroticism_min}
+        maxValue={filters.big5_neuroticism_max}
+        onChange={(min, max) =>
+          updateFilter({
+            big5_neuroticism_min: min,
+            big5_neuroticism_max: max,
+          })
+        }
+      />
+    </div>
+  )
+}
+
+
diff --git a/web/components/filters/desktop-filters.tsx b/web/components/filters/desktop-filters.tsx
index 8eb125d..1f8dbc2 100644
--- a/web/components/filters/desktop-filters.tsx
+++ b/web/components/filters/desktop-filters.tsx
@@ -42,6 +42,7 @@ import {InterestFilter, InterestFilterText} from "web/components/filters/interes
 import {OptionTableKey} from "common/profiles/constants";
 import {useT} from "web/lib/locale";
 import {ResetFiltersButton} from "web/components/searches/button";
+import {Big5Filters, Big5FilterText, hasAnyBig5Filter} from "web/components/filters/big5-filter";
 
 export function DesktopFilters(props: {
   filters: Partial<FilterFields>
@@ -646,6 +647,31 @@ export function DesktopFilters(props: {
         menuWidth="w-[400px]"
       />
 
+      {/* BIG FIVE PERSONALITY */}
+      <CustomizeableDropdown
+        buttonContent={(open) => (
+          <DropdownButton
+            open={open}
+            content={
+              <Row className="items-center gap-1">
+                <BsPersonVcard className="h-4 w-4"/>
+                <Big5FilterText
+                  filters={filters}
+                  highlightedClass={open || hasAnyBig5Filter(filters) ? 'text-primary-500' : undefined}
+                />
+              </Row>
+            }
+          />
+        )}
+        dropdownMenuContent={
+          <Col className="mx-2 mb-4">
+            <Big5Filters filters={filters} updateFilter={updateFilter}/>
+          </Col>
+        }
+        popoverClassName="bg-canvas-50"
+        menuWidth="w-[420px]"
+      />
+
       {/* EDUCATION */}
       <CustomizeableDropdown
         buttonContent={(open: boolean) => (
diff --git a/web/components/filters/mobile-filters.tsx b/web/components/filters/mobile-filters.tsx
index 823890a..6820bd2 100644
--- a/web/components/filters/mobile-filters.tsx
+++ b/web/components/filters/mobile-filters.tsx
@@ -43,6 +43,7 @@ import {LuCigarette, LuGraduationCap} from "react-icons/lu";
 import {RiScales3Line} from "react-icons/ri";
 import {PiHandsPrayingBold} from "react-icons/pi";
 import {ResetFiltersButton} from "web/components/searches/button";
+import {Big5Filters, Big5FilterText, hasAnyBig5Filter} from "web/components/filters/big5-filter";
 import {FilterGuide} from "web/components/guidance";
 
 function MobileFilters(props: {
@@ -534,6 +535,25 @@ function MobileFilters(props: {
         <MbtiFilter filters={filters} updateFilter={updateFilter}/>
       </MobileFilterSection>
 
+      {/* BIG FIVE PERSONALITY */}
+      <MobileFilterSection
+        title={t('profile.big5', 'Personality (Big Five)')}
+        openFilter={openFilter}
+        setOpenFilter={setOpenFilter}
+        isActive={hasAnyBig5Filter(filters)}
+        icon={<BsPersonVcard className="h-4 w-4"/>}
+        selection={
+          <Big5FilterText
+            filters={filters}
+            highlightedClass={
+              hasAnyBig5Filter(filters) ? 'text-primary-600' : 'text-ink-900'
+            }
+          />
+        }
+      >
+        <Big5Filters filters={filters} updateFilter={updateFilter}/>
+      </MobileFilterSection>
+
       {/* EDUCATION */}
       <MobileFilterSection
         title={t("profile.education.short_name", "Education")}
diff --git a/web/components/optional-profile-form.tsx b/web/components/optional-profile-form.tsx
index 1e9b568..813a124 100644
--- a/web/components/optional-profile-form.tsx
+++ b/web/components/optional-profile-form.tsx
@@ -47,6 +47,7 @@ import {AddOptionEntry} from "web/components/add-option-entry";
 import {sleep} from "common/util/time"
 import {SignupBio} from "web/components/bio/editable-bio";
 import {Editor} from "@tiptap/core";
+import {Slider} from "web/components/widgets/slider";
 
 
 export const OptionalProfileUserForm = (props: {
@@ -644,6 +645,55 @@ export const OptionalProfileUserForm = (props: {
           />
         </Col>
 
+        {/* Big Five personality traits (0–100) */}
+        <Col className={clsx(colClassName, 'max-w-[550px]')}>
+          <label className={clsx(labelClassName)}>
+            {t('profile.big5', 'Big Five Personality Traits')}
+          </label>
+          <div className="space-y-4">
+            <Big5Slider
+              label={t('profile.big5_openness', 'Openness')}
+              value={profile.big5_openness ?? 50}
+              onChange={(v) => setProfile('big5_openness', v)}
+            />
+            <Big5Slider
+              label={t(
+                'profile.big5_conscientiousness',
+                'Conscientiousness'
+              )}
+              value={profile.big5_conscientiousness ?? 50}
+              onChange={(v) => setProfile('big5_conscientiousness', v)}
+            />
+            <Big5Slider
+              label={t('profile.big5_extraversion', 'Extraversion')}
+              value={profile.big5_extraversion ?? 50}
+              onChange={(v) => setProfile('big5_extraversion', v)}
+            />
+            <Big5Slider
+              label={t(
+                'profile.big5_agreeableness',
+                'Agreeableness'
+              )}
+              value={profile.big5_agreeableness ?? 50}
+              onChange={(v) => setProfile('big5_agreeableness', v)}
+            />
+            <Big5Slider
+              label={t(
+                'profile.big5_neuroticism',
+                'Neuroticism'
+              )}
+              value={profile.big5_neuroticism ?? 50}
+              onChange={(v) => setProfile('big5_neuroticism', v)}
+            />
+            <p className="text-sm text-ink-500">
+              {t(
+                'profile.big5_hint',
+                'Drag each slider to set where you see yourself on these traits (0 = low, 100 = high).'
+              )}
+            </p>
+          </div>
+        </Col>
+
         <Category title={t('profile.optional.diet', 'Diet')}/>
 
         <Col className={clsx(colClassName)}>
@@ -900,3 +950,33 @@ function Category({title, className}: { title: string, className?: string }) {
   return <h3 className={clsx("text-xl font-semibold mb-[-8px]", className)}>{title}</h3>;
 }
 
+const Big5Slider = (props: {
+  label: string
+  value: number
+  onChange: (v: number) => void
+}) => {
+  const {label, value, onChange} = props
+  return (
+    <div>
+      <div className="mb-1 flex items-center justify-between text-sm text-ink-600">
+        <span>{label}</span>
+        <span className="font-semibold text-ink-700">{Math.round(value)}</span>
+      </div>
+      <Slider
+        amount={value}
+        min={0}
+        max={100}
+        onChange={(v) => onChange(Math.round(v))}
+        marks={[
+          {value: 0, label: '0'},
+          {value: 25, label: '25'},
+          {value: 50, label: '50'},
+          {value: 75, label: '75'},
+          {value: 100, label: '100'},
+        ]}
+      />
+    </div>
+  )
+}
+
+
diff --git a/web/components/profile-about.tsx b/web/components/profile-about.tsx
index a3015c8..aa9eefe 100644
--- a/web/components/profile-about.tsx
+++ b/web/components/profile-about.tsx
@@ -34,6 +34,7 @@ import {FaBriefcase, FaHandsHelping, FaHeart, FaStar} from "react-icons/fa";
 import {useLocale, useT} from "web/lib/locale";
 import {useChoices} from "web/hooks/use-choices";
 import {getSeekingGenderText} from "web/lib/profile/seeking";
+import {TbBulb, TbCheck, TbMoodSad, TbUsers} from "react-icons/tb";
 
 export function AboutRow(props: {
   icon: ReactNode
@@ -119,6 +120,7 @@ export default function ProfileAbout(props: {
         icon={<BsPersonVcard className="h-5 w-5"/>}
         text={profile.mbti ? INVERTED_MBTI_CHOICES[profile.mbti] : null}
       />
+      <Big5Traits profile={profile}/>
       <AboutRow
         icon={<HiOutlineGlobe className="h-5 w-5"/>}
         text={profile.ethnicity
@@ -340,6 +342,85 @@ function LastOnline(props: { lastOnlineTime?: string }) {
   )
 }
 
+function Big5Traits(props: { profile: Profile }) {
+  const t = useT()
+  const {profile} = props
+
+  const traits = [
+    {
+      key: 'big5_openness',
+      icon: <TbBulb className="h-5 w-5"/>,
+      label: t('profile.big5_openness', 'Openness'),
+      value: profile.big5_openness
+    },
+    {
+      key: 'big5_conscientiousness',
+      icon: <TbCheck className="h-5 w-5"/>,
+      label: t('profile.big5_conscientiousness', 'Conscientiousness'),
+      value: profile.big5_conscientiousness
+    },
+    {
+      key: 'big5_extraversion',
+      icon: <TbUsers className="h-5 w-5"/>,
+      label: t('profile.big5_extraversion', 'Extraversion'),
+      value: profile.big5_extraversion
+    },
+    {
+      key: 'big5_agreeableness',
+      icon: <FaHeart className="h-5 w-5"/>,
+      label: t('profile.big5_agreeableness', 'Agreeableness'),
+      value: profile.big5_agreeableness
+    },
+    {
+      key: 'big5_neuroticism',
+      icon: <TbMoodSad className="h-5 w-5"/>,
+      label: t('profile.big5_neuroticism', 'Neuroticism'),
+      value: profile.big5_neuroticism
+    }
+  ]
+
+  const hasAnyTraits = traits.some(trait => trait.value !== null && trait.value !== undefined)
+
+  if (!hasAnyTraits) {
+    return <></>
+  }
+
+  return (
+    <Col className="gap-2">
+      <div className="text-ink-600 font-medium">
+        {t('profile.big5', 'Big Five personality traits')}:
+      </div>
+      <div className="ml-6">
+        {traits.map((trait) => {
+          if (trait.value === null || trait.value === undefined) return null
+
+          let levelText: string
+          if (trait.value <= 20) {
+            levelText = t('profile.big5_very_low', 'Very low')
+          } else if (trait.value <= 40) {
+            levelText = t('profile.big5_low', 'Low')
+          } else if (trait.value <= 60) {
+            levelText = t('profile.big5_average', 'Average')
+          } else if (trait.value <= 80) {
+            levelText = t('profile.big5_high', 'High')
+          } else {
+            levelText = t('profile.big5_very_high', 'Very high')
+          }
+
+          return (
+            <Row key={trait.key} className="items-center gap-2">
+              <div className="text-ink-600 w-5">{trait.icon}</div>
+              <div>
+                {trait.label}: {levelText} ({trait.value})
+              </div>
+            </Row>
+          )
+        })}
+      </div>
+    </Col>
+  )
+}
+
 function HasKids(props: { profile: Profile }) {
   const t = useT()
   const {profile} = props
diff --git a/web/messages/de.json b/web/messages/de.json
index 0bb97bd..2c1c46c 100644
--- a/web/messages/de.json
+++ b/web/messages/de.json
@@ -212,6 +212,8 @@
   "filter.any_relationship": "Jede romantische Beziehung",
   "filter.any_religion": "Jede Religion",
   "filter.any_work": "Jede Arbeit",
+  "filter.big5.any": "Beliebige Big 5",
+  "filter.big5.custom": "Benutzerdefinierte Big 5",
   "filter.gender.any": "Alle",
   "filter.gender.gender": "Geschlecht",
   "filter.gender.genders": "Geschlechter",
@@ -647,6 +649,19 @@
   "profile.optional.username_or_url": "Benutzername oder URL",
   "profile.optional.want_kids": "Ich möchte Kinder haben",
   "profile.optional.work": "Arbeit",
+  "profile.big5_openness": "Offenheit",
+  "profile.big5_conscientiousness": "Gewissenhaftigkeit",
+  "profile.big5_extraversion": "Extraversion",
+  "profile.big5_agreeableness": "Verträglichkeit",
+  "profile.big5_neuroticism": "Neurotizismus",
+  "profile.big5": "Persönlichkeit (Big Five)",
+  "profile.big5_hint": "Ziehen Sie jeden Schieber, um festzulegen, wo Sie sich bei diesen Merkmalen sehen (0 = niedrig, 100 = hoch).",
+  "profile.big5_very_low": "Sehr niedrig",
+  "profile.big5_low": "Niedrig",
+  "profile.big5_average": "Durchschnittlich",
+  "profile.big5_high": "Hoch",
+  "profile.big5_very_high": "Sehr hoch",
+  "profile.optional.big5_hint": "Ziehen Sie jeden Schieber, um festzulegen, wo Sie sich bei diesen Merkmalen sehen (0 = niedrig, 100 = hoch).",
   "profile.political.conservative": "Konservativ",
   "profile.political.e/acc": "Effektiver Akzelerationismus",
   "profile.political.green": "Grün / Ökosozialismus",
diff --git a/web/messages/fr.json b/web/messages/fr.json
index 7a424f9..77672e7 100644
--- a/web/messages/fr.json
+++ b/web/messages/fr.json
@@ -212,6 +212,8 @@
   "filter.any_relationship": "Toute relation amoureuse",
   "filter.any_religion": "Toute religion",
   "filter.any_work": "Tout travail",
+  "filter.big5.any": "Tout Big 5",
+  "filter.big5.custom": "Certains Big 5",
   "filter.gender.any": "Tout",
   "filter.gender.gender": "genre",
   "filter.gender.genders": "genres",
@@ -647,6 +649,19 @@
   "profile.optional.username_or_url": "Nom d'utilisateur ou URL",
   "profile.optional.want_kids": "Je souhaite avoir des enfants",
   "profile.optional.work": "Domaine de travail",
+  "profile.big5_openness": "Ouverture",
+  "profile.big5_conscientiousness": "Conscienciosité",
+  "profile.big5_extraversion": "Extraversion",
+  "profile.big5_agreeableness": "Agréabilité",
+  "profile.big5_neuroticism": "Névrosisme",
+  "profile.big5": "Big Five",
+  "profile.big5_hint": "Faites glisser chaque curseur pour définir où vous vous situez sur ces traits (0 = faible, 100 = élevé).",
+  "profile.big5_very_low": "Très faible",
+  "profile.big5_low": "Faible",
+  "profile.big5_average": "Moyen",
+  "profile.big5_high": "Élevé",
+  "profile.big5_very_high": "Très élevé",
+  "profile.optional.big5_hint": "Faites glisser chaque curseur pour définir où vous vous situez sur ces traits (0 = faible, 100 = élevé).",
   "profile.political.conservative": "Conservateur·trice",
   "profile.political.e/acc": "Accélérationnisme efficace",
   "profile.political.green": "Vert·e / Éco-socialiste",