diff --git a/frontend/src/pages/user-file.vue b/frontend/src/pages/user-file.vue
index abeb856..8b150fb 100644
--- a/frontend/src/pages/user-file.vue
+++ b/frontend/src/pages/user-file.vue
@@ -8,6 +8,7 @@
     name: string
     identifier: string
     type: string
+    relationshipType?: 'ONE_TO_ONE' | 'ONE_TO_MANY'
   }
   interface LinkedEntity {
     entity: { id: number, name: string, identifier: string, fields: Field[] }
@@ -36,6 +37,14 @@
     return linked.entity.fields.filter(field => field.id !== linked.relationshipField.id)
   }
 
+  function isOneToOne (linked: LinkedEntity) {
+    return linked.relationshipField.relationshipType === 'ONE_TO_ONE'
+  }
+
+  function createLabel (linked: LinkedEntity) {
+    return `${isOneToOne(linked) ? 'Create' : 'Add'} ${linked.entity.name}`
+  }
+
   function inputType (field: Field) {
     if (['NUMBER', 'RELATIONSHIP', 'USER'].includes(field.type)) return 'number'
     if (field.type === 'DATE') return 'date'
@@ -136,15 +145,22 @@
         <div class="entity-heading">
           <div>
             <h2>{{ linked.entity.name }}</h2>
-            <p>{{ linked.records.length }} linked {{ linked.records.length === 1 ? 'record' : 'records' }}</p>
+            <p v-if="isOneToOne(linked)">{{ linked.records.length === 0 ? 'Not created' : 'Created' }}</p>
+            <p v-else>{{ linked.records.length }} linked {{ linked.records.length === 1 ? 'record' : 'records' }}</p>
           </div>
 
-          <button type="button" @click="startAddingChild(linked)">Add {{ linked.entity.name }}</button>
+          <button
+            v-if="!isOneToOne(linked) || linked.records.length === 0"
+            type="button"
+            @click="startAddingChild(linked)"
+          >
+            {{ createLabel(linked) }}
+          </button>
         </div>
 
         <form
           v-if="addingChildKey === childKey(linked)"
-          :aria-label="`Add ${linked.entity.name}`"
+          :aria-label="createLabel(linked)"
           class="child-form"
           @submit.prevent="addChild(linked)"
         >
@@ -157,12 +173,21 @@
           </label>
 
           <div class="form-actions">
-            <button :disabled="saving" type="submit">{{ saving ? 'Adding…' : `Add ${linked.entity.name}` }}</button>
+            <button :disabled="saving" type="submit">{{ saving ? 'Saving…' : createLabel(linked) }}</button>
             <button :disabled="saving" type="button" @click="addingChildKey = ''">Cancel</button>
           </div>
         </form>
 
-        <p v-if="linked.records.length === 0" class="no-records">No records linked to this user.</p>
+        <p v-if="linked.records.length === 0" class="no-records">
+          {{ isOneToOne(linked) ? `No ${linked.entity.name} has been created.` : 'No records linked to this user.' }}
+        </p>
+
+        <dl v-else-if="isOneToOne(linked)" class="record-details">
+          <template v-for="field in linked.entity.fields" :key="field.id">
+            <dt>{{ field.name }}</dt>
+            <dd>{{ displayValue(linked.records[0][field.identifier]) }}</dd>
+          </template>
+        </dl>
 
         <div v-else class="table-scroll">
           <table>
@@ -217,6 +242,9 @@
   .entity-heading p { margin: 0.35rem 0 0; font-size: 0.9rem; }
   .empty-state, .no-records { padding: 1.5rem; }
   .table-scroll { overflow-x: auto; }
+  .record-details { display: grid; grid-template-columns: minmax(8rem, 12rem) 1fr; margin: 0; padding: 1.25rem; gap: 0.75rem 1rem; }
+  .record-details dt { color: var(--v0-on-surface-variant); font-size: 0.8rem; font-weight: 700; text-transform: uppercase; }
+  .record-details dd { margin: 0; }
   table { width: 100%; border-collapse: collapse; text-align: left; white-space: nowrap; }
   th, td { padding: 0.85rem 1rem; border-bottom: 1px solid var(--v0-divider); }
   th { color: var(--v0-on-surface-variant); font-size: 0.75rem; text-transform: uppercase; }
diff --git a/frontend/tests/user-file.spec.ts b/frontend/tests/user-file.spec.ts
index 7903e94..5857979 100644
--- a/frontend/tests/user-file.spec.ts
+++ b/frontend/tests/user-file.spec.ts
@@ -16,6 +16,7 @@ test('admin opens a user file and views a linked entity record', async ({ page }
   const tasks: Record<string, unknown>[] = []
   const notes: Record<string, unknown>[] = []
   const milestones: Record<string, unknown>[] = []
+  const profiles: Record<string, unknown>[] = []
   const projectResponse = () => ({
     entity: {
       id: 3,
@@ -107,6 +108,24 @@ test('admin opens a user file and views a linked entity record', async ({ page }
         },
         relationshipField: { id: 12, name: 'Owner', identifier: 'owner', type: 'USER' },
         records: projects,
+      }, {
+        entity: {
+          id: 8,
+          name: 'Profile',
+          identifier: 'profile',
+          fields: [
+            { id: 50, name: 'Biography', identifier: 'biography', type: 'TEXT' },
+            { id: 51, name: 'User', identifier: 'user', type: 'USER', relationshipType: 'ONE_TO_ONE' },
+          ],
+        },
+        relationshipField: {
+          id: 51,
+          name: 'User',
+          identifier: 'user',
+          type: 'USER',
+          relationshipType: 'ONE_TO_ONE',
+        },
+        records: profiles,
       }],
     },
   }))
@@ -119,6 +138,15 @@ test('admin opens a user file and views a linked entity record', async ({ page }
       json: { entity: projectResponse().entity, values: created, children: [] },
     })
   })
+  await page.route('**/api/users/7/children/Profile/51', async route => {
+    const values = new URLSearchParams(route.request().postData() ?? '')
+    const created = { id: 70, biography: values.get('biography'), user: 7 }
+    profiles.push(created)
+    await route.fulfill({
+      status: 201,
+      json: { entity: { id: 8, name: 'Profile' }, values: created, children: [] },
+    })
+  })
   await page.route('**/api/users/7/entities/Project/records/42', async route => {
     if (route.request().method() === 'PATCH') {
       const values = new URLSearchParams(route.request().postData() ?? '')
@@ -190,6 +218,17 @@ test('admin opens a user file and views a linked entity record', async ({ page }
   await expect(page.getByRole('heading', { name: 'Project' })).toBeVisible()
   await expect(page.getByRole('row').filter({ hasText: 'Website refresh' })).toContainText('7')
 
+  const profile = page.locator('.entity-card').filter({ has: page.getByRole('heading', { name: 'Profile' }) })
+  await expect(profile.getByText('No Profile has been created.')).toBeVisible()
+  await expect(profile.locator('table')).not.toBeVisible()
+  await profile.getByRole('button', { name: 'Create Profile' }).click()
+  const profileForm = profile.getByRole('form', { name: 'Create Profile' })
+  await profileForm.getByLabel('Biography').fill('Product specialist')
+  await profileForm.getByRole('button', { name: 'Create Profile' }).click()
+  await expect(profile.getByText('Product specialist')).toBeVisible()
+  await expect(profile.getByRole('button', { name: 'Create Profile' })).not.toBeVisible()
+  await expect(profile.locator('table')).not.toBeVisible()
+
   await page.getByRole('button', { name: 'Add Project' }).click()
   const projectForm = page.getByRole('form', { name: 'Add Project' })
   await projectForm.getByLabel('Title').fill('Mobile application')