diff --git a/packages/backend/src/server/api/endpoints/admin/meta.ts b/packages/backend/src/server/api/endpoints/admin/meta.ts
index 0ecf9c0d4f..7c5f60b5cc 100644
--- a/packages/backend/src/server/api/endpoints/admin/meta.ts
+++ b/packages/backend/src/server/api/endpoints/admin/meta.ts
@@ -9,6 +9,7 @@ import { MetaService } from '@/core/MetaService.js';
 import type { Config } from '@/config.js';
 import { DI } from '@/di-symbols.js';
 import { DEFAULT_POLICIES } from '@/core/RoleService.js';
+import { SystemAccountService } from '@/core/SystemAccountService.js';
 
 export const meta = {
 	tags: ['meta'],
@@ -231,6 +232,11 @@ export const meta = {
 				type: 'boolean',
 				optional: false, nullable: false,
 			},
+			proxyAccountId: {
+				type: 'string',
+				optional: false, nullable: true,
+				format: 'id',
+			},
 			email: {
 				type: 'string',
 				optional: false, nullable: true,
@@ -536,10 +542,13 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 		private config: Config,
 
 		private metaService: MetaService,
+		private systemAccountService: SystemAccountService,
 	) {
 		super(meta, paramDef, async () => {
 			const instance = await this.metaService.fetch(true);
 
+			const proxy = await this.systemAccountService.fetch('proxy');
+
 			return {
 				maintainerName: instance.maintainerName,
 				maintainerEmail: instance.maintainerEmail,
@@ -603,6 +612,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				sensitiveMediaDetectionSensitivity: instance.sensitiveMediaDetectionSensitivity,
 				setSensitiveFlagAutomatically: instance.setSensitiveFlagAutomatically,
 				enableSensitiveMediaDetectionForVideos: instance.enableSensitiveMediaDetectionForVideos,
+				proxyAccountId: proxy.id,
 				email: instance.email,
 				smtpSecure: instance.smtpSecure,
 				smtpHost: instance.smtpHost,
diff --git a/packages/frontend/src/pages/admin/settings.vue b/packages/frontend/src/pages/admin/settings.vue
index ea7603a45a..49a8642816 100644
--- a/packages/frontend/src/pages/admin/settings.vue
+++ b/packages/frontend/src/pages/admin/settings.vue
@@ -238,15 +238,17 @@ SPDX-License-Identifier: AGPL-3.0-only
 				<MkFolder>
 					<template #icon><i class="ti ti-ghost"></i></template>
 					<template #label>{{ i18n.ts.proxyAccount }}</template>
+					<template v-if="proxyAccountForm.modified.value" #footer>
+						<MkFormFooter :form="proxyAccountForm"/>
+					</template>
 
 					<div class="_gaps">
 						<MkInfo>{{ i18n.ts.proxyAccountDescription }}</MkInfo>
-						<MkKeyValue>
-							<template #key>{{ i18n.ts.proxyAccount }}</template>
-							<template #value>{{ proxyAccount ? `@${proxyAccount.username}` : i18n.ts.none }}</template>
-						</MkKeyValue>
 
-						<MkButton primary @click="chooseProxyAccount">{{ i18n.ts.selectAccount }}</MkButton>
+						<MkTextarea v-model="proxyAccountForm.state.description" :max="500" tall mfmAutocomplete :mfmPreview="true">
+							<template #label>{{ i18n.ts._profile.description }}</template>
+							<template #caption>{{ i18n.ts._profile.youCanIncludeHashtags }}</template>
+						</MkTextarea>
 					</div>
 				</MkFolder>
 			</div>
@@ -256,7 +258,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 </template>
 
 <script lang="ts" setup>
-import { ref, computed } from 'vue';
+import { ref, computed, reactive } from 'vue';
 import XHeader from './_header_.vue';
 import MkSwitch from '@/components/MkSwitch.vue';
 import MkInput from '@/components/MkInput.vue';
@@ -277,7 +279,11 @@ import MkRadios from '@/components/MkRadios.vue';
 
 const meta = await misskeyApi('admin/meta');
 
-const proxyAccount = ref(meta.proxyAccountId ? await misskeyApi('users/show', { userId: meta.proxyAccountId }) : null);
+const proxyAccount = await misskeyApi('users/show', { userId: meta.proxyAccountId });
+
+const proxyAccountProfile = reactive({
+	description: proxyAccount.description,
+});
 
 const infoForm = useForm({
 	name: meta.name ?? '',
@@ -378,16 +384,14 @@ const federationForm = useForm({
 	fetchInstance(true);
 });
 
-function chooseProxyAccount() {
-	os.selectUser({ localOnly: true }).then(user => {
-		proxyAccount.value = user;
-		os.apiWithDialog('admin/update-meta', {
-			proxyAccountId: user.id,
-		}).then(() => {
-			fetchInstance(true);
-		});
+const proxyAccountForm = useForm({
+	description: proxyAccountProfile.description,
+}, async (state) => {
+	await os.apiWithDialog('admin/update-proxy-account', {
+		description: state.description,
 	});
-}
+	fetchInstance(true);
+});
 
 const headerTabs = computed(() => []);
 
diff --git a/packages/misskey-js/src/autogen/types.ts b/packages/misskey-js/src/autogen/types.ts
index 31d05dab6c..ba28fe6349 100644
--- a/packages/misskey-js/src/autogen/types.ts
+++ b/packages/misskey-js/src/autogen/types.ts
@@ -8282,6 +8282,8 @@ export type operations = {
             sensitiveMediaDetectionSensitivity: string;
             setSensitiveFlagAutomatically: boolean;
             enableSensitiveMediaDetectionForVideos: boolean;
+            /** Format: id */
+            proxyAccountId: string | null;
             email: string | null;
             smtpSecure: boolean;
             smtpHost: string | null;