diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0ad55752b1..4038755124 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -47,6 +47,7 @@
 - Enhance: プラグインで`Plugin:register_note_view_interruptor`を用いてnoteの代わりにnullを返却することでノートを非表示にできるようになりました
 - Enhance: AiScript関数`Mk:nyaize()`が追加されました
 - Enhance: 情報→ツール はナビゲーションバーにツールとして独立した項目になりました
+- Enhance: ノート内のカスタム絵文字をクリックすることで、コピーおよびリアクションができるように
 - Enhance: その他細かなブラッシュアップ
 - Fix: 投稿フォームでのユーザー変更がプレビューに反映されない問題を修正
 - Fix: ユーザーページの ノート > ファイル付き タブにリプライが表示されてしまう
diff --git a/locales/index.d.ts b/locales/index.d.ts
index 50b11acc06..aedaaa9f7c 100644
--- a/locales/index.d.ts
+++ b/locales/index.d.ts
@@ -1160,6 +1160,7 @@ export interface Locale {
     "useGroupedNotifications": string;
     "signupPendingError": string;
     "cwNotationRequired": string;
+    "doReaction": string;
     "_announcement": {
         "forExistingUsers": string;
         "forExistingUsersDescription": string;
diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index de4e8ce2b3..6ecebfc393 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -1157,6 +1157,7 @@ disableStreamingTimeline: "タイムラインのリアルタイム更新を無
 useGroupedNotifications: "通知をグルーピングして表示する"
 signupPendingError: "メールアドレスの確認中に問題が発生しました。リンクの有効期限が切れている可能性があります。"
 cwNotationRequired: "「内容を隠す」がオンの場合は注釈の記述が必要です。"
+doReaction: "リアクションする"
 
 _announcement:
   forExistingUsers: "既存ユーザーのみ"
diff --git a/packages/frontend/src/components/MkNote.vue b/packages/frontend/src/components/MkNote.vue
index 30a68f38f2..0ae3423a21 100644
--- a/packages/frontend/src/components/MkNote.vue
+++ b/packages/frontend/src/components/MkNote.vue
@@ -53,19 +53,28 @@ SPDX-License-Identifier: AGPL-3.0-only
 			<MkInstanceTicker v-if="showTicker" :instance="appearNote.user.instance"/>
 			<div style="container-type: inline-size;">
 				<p v-if="appearNote.cw != null" :class="$style.cw">
-					<Mfm v-if="appearNote.cw != ''" style="margin-right: 8px;" :text="appearNote.cw" :author="appearNote.user" :nyaize="'account'" :i="$i"/>
+					<Mfm v-if="appearNote.cw != ''" style="margin-right: 8px;" :text="appearNote.cw" :author="appearNote.user" :nyaize="'account'"/>
 					<MkCwButton v-model="showContent" :note="appearNote" style="margin: 4px 0;"/>
 				</p>
 				<div v-show="appearNote.cw == null || showContent" :class="[{ [$style.contentCollapsed]: collapsed }]">
 					<div :class="$style.text">
 						<span v-if="appearNote.isHidden" style="opacity: 0.5">({{ i18n.ts.private }})</span>
 						<MkA v-if="appearNote.replyId" :class="$style.replyIcon" :to="`/notes/${appearNote.replyId}`"><i class="ti ti-arrow-back-up"></i></MkA>
-						<Mfm v-if="appearNote.text" :parsedNodes="parsed" :text="appearNote.text" :author="appearNote.user" :nyaize="'account'" :i="$i" :emojiUrls="appearNote.emojis"/>
+						<Mfm
+							v-if="appearNote.text"
+							:parsedNodes="parsed"
+							:text="appearNote.text"
+							:author="appearNote.user"
+							:nyaize="'account'"
+							:emojiUrls="appearNote.emojis"
+							:enableEmojiMenu="true"
+							:enableEmojiMenuReaction="true"
+						/>
 						<div v-if="translating || translation" :class="$style.translation">
 							<MkLoading v-if="translating" mini/>
 							<div v-else>
 								<b>{{ i18n.t('translatedFrom', { x: translation.sourceLang }) }}: </b>
-								<Mfm :text="translation.text" :author="appearNote.user" :nyaize="'account'" :i="$i" :emojiUrls="appearNote.emojis"/>
+								<Mfm :text="translation.text" :author="appearNote.user" :nyaize="'account'" :emojiUrls="appearNote.emojis"/>
 							</div>
 						</div>
 					</div>
@@ -242,6 +251,13 @@ const keymap = {
 	's': () => showContent.value !== showContent.value,
 };
 
+provide('react', (reaction: string) => {
+	os.api('notes/reactions/create', {
+		noteId: appearNote.id,
+		reaction: reaction,
+	});
+});
+
 if (props.mock) {
 	watch(() => props.note, (to) => {
 		note = deepClone(to);
diff --git a/packages/frontend/src/components/MkNoteDetailed.vue b/packages/frontend/src/components/MkNoteDetailed.vue
index 9e9b1035d7..ff2941344e 100644
--- a/packages/frontend/src/components/MkNoteDetailed.vue
+++ b/packages/frontend/src/components/MkNoteDetailed.vue
@@ -67,19 +67,19 @@ SPDX-License-Identifier: AGPL-3.0-only
 		</header>
 		<div :class="$style.noteContent">
 			<p v-if="appearNote.cw != null" :class="$style.cw">
-				<Mfm v-if="appearNote.cw != ''" style="margin-right: 8px;" :text="appearNote.cw" :author="appearNote.user" :nyaize="'account'" :i="$i"/>
+				<Mfm v-if="appearNote.cw != ''" style="margin-right: 8px;" :text="appearNote.cw" :author="appearNote.user" :nyaize="'account'"/>
 				<MkCwButton v-model="showContent" :note="appearNote"/>
 			</p>
 			<div v-show="appearNote.cw == null || showContent">
 				<span v-if="appearNote.isHidden" style="opacity: 0.5">({{ i18n.ts.private }})</span>
 				<MkA v-if="appearNote.replyId" :class="$style.noteReplyTarget" :to="`/notes/${appearNote.replyId}`"><i class="ti ti-arrow-back-up"></i></MkA>
-				<Mfm v-if="appearNote.text" :parsedNodes="parsed" :text="appearNote.text" :author="appearNote.user" :nyaize="'account'" :i="$i" :emojiUrls="appearNote.emojis"/>
+				<Mfm v-if="appearNote.text" :parsedNodes="parsed" :text="appearNote.text" :author="appearNote.user" :nyaize="'account'" :emojiUrls="appearNote.emojis"/>
 				<a v-if="appearNote.renote != null" :class="$style.rn">RN:</a>
 				<div v-if="translating || translation" :class="$style.translation">
 					<MkLoading v-if="translating" mini/>
 					<div v-else>
 						<b>{{ i18n.t('translatedFrom', { x: translation.sourceLang }) }}: </b>
-						<Mfm :text="translation.text" :author="appearNote.user" :nyaize="'account'" :i="$i" :emojiUrls="appearNote.emojis"/>
+						<Mfm :text="translation.text" :author="appearNote.user" :nyaize="'account'" :emojiUrls="appearNote.emojis"/>
 					</div>
 				</div>
 				<div v-if="appearNote.files.length > 0">
diff --git a/packages/frontend/src/components/MkNoteSimple.vue b/packages/frontend/src/components/MkNoteSimple.vue
index dc401a7ecb..28b00af246 100644
--- a/packages/frontend/src/components/MkNoteSimple.vue
+++ b/packages/frontend/src/components/MkNoteSimple.vue
@@ -10,7 +10,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 		<MkNoteHeader :class="$style.header" :note="note" :mini="true"/>
 		<div>
 			<p v-if="note.cw != null" :class="$style.cw">
-				<Mfm v-if="note.cw != ''" style="margin-right: 8px;" :text="note.cw" :author="note.user" :nyaize="'account'" :i="$i" :emojiUrls="note.emojis"/>
+				<Mfm v-if="note.cw != ''" style="margin-right: 8px;" :text="note.cw" :author="note.user" :nyaize="'account'" :emojiUrls="note.emojis"/>
 				<MkCwButton v-model="showContent" :note="note"/>
 			</p>
 			<div v-show="note.cw == null || showContent">
diff --git a/packages/frontend/src/components/MkNoteSub.vue b/packages/frontend/src/components/MkNoteSub.vue
index 3cc8767007..f61b963d9b 100644
--- a/packages/frontend/src/components/MkNoteSub.vue
+++ b/packages/frontend/src/components/MkNoteSub.vue
@@ -12,7 +12,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 			<MkNoteHeader :class="$style.header" :note="note" :mini="true"/>
 			<div>
 				<p v-if="note.cw != null" :class="$style.cw">
-					<Mfm v-if="note.cw != ''" style="margin-right: 8px;" :text="note.cw" :author="note.user" :nyaize="'account'" :i="$i"/>
+					<Mfm v-if="note.cw != ''" style="margin-right: 8px;" :text="note.cw" :author="note.user" :nyaize="'account'"/>
 					<MkCwButton v-model="showContent" :note="note"/>
 				</p>
 				<div v-show="note.cw == null || showContent">
diff --git a/packages/frontend/src/components/MkSubNoteContent.vue b/packages/frontend/src/components/MkSubNoteContent.vue
index 51dabee161..e9f2b838d2 100644
--- a/packages/frontend/src/components/MkSubNoteContent.vue
+++ b/packages/frontend/src/components/MkSubNoteContent.vue
@@ -9,7 +9,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 		<span v-if="note.isHidden" style="opacity: 0.5">({{ i18n.ts.private }})</span>
 		<span v-if="note.deletedAt" style="opacity: 0.5">({{ i18n.ts.deleted }})</span>
 		<MkA v-if="note.replyId" :class="$style.reply" :to="`/notes/${note.replyId}`"><i class="ti ti-arrow-back-up"></i></MkA>
-		<Mfm v-if="note.text" :text="note.text" :author="note.user" :i="$i" :emojiUrls="note.emojis"/>
+		<Mfm v-if="note.text" :text="note.text" :author="note.user" :emojiUrls="note.emojis"/>
 		<MkA v-if="note.renoteId" :class="$style.rp" :to="`/notes/${note.renoteId}`">RN: ...</MkA>
 	</div>
 	<details v-if="note.files.length > 0">
diff --git a/packages/frontend/src/components/MkUserInfo.vue b/packages/frontend/src/components/MkUserInfo.vue
index c13ef60f3b..eaebbf03e7 100644
--- a/packages/frontend/src/components/MkUserInfo.vue
+++ b/packages/frontend/src/components/MkUserInfo.vue
@@ -14,7 +14,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 	<span v-if="$i && $i.id !== user.id && user.isFollowed" :class="$style.followed">{{ i18n.ts.followsYou }}</span>
 	<div :class="$style.description">
 		<div v-if="user.description" :class="$style.mfm">
-			<Mfm :text="user.description" :author="user" :i="$i"/>
+			<Mfm :text="user.description" :author="user"/>
 		</div>
 		<span v-else style="opacity: 0.7;">{{ i18n.ts.noAccountDescription }}</span>
 	</div>
diff --git a/packages/frontend/src/components/MkUserPopup.vue b/packages/frontend/src/components/MkUserPopup.vue
index bcba4196b5..20eb9b3e93 100644
--- a/packages/frontend/src/components/MkUserPopup.vue
+++ b/packages/frontend/src/components/MkUserPopup.vue
@@ -27,7 +27,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 				<div :class="$style.username"><MkAcct :user="user"/></div>
 			</div>
 			<div :class="$style.description">
-				<Mfm v-if="user.description" :class="$style.mfm" :text="user.description" :author="user" :i="$i"/>
+				<Mfm v-if="user.description" :class="$style.mfm" :text="user.description" :author="user"/>
 				<div v-else style="opacity: 0.7;">{{ i18n.ts.noAccountDescription }}</div>
 			</div>
 			<div :class="$style.status">
diff --git a/packages/frontend/src/components/MkUserSetupDialog.User.vue b/packages/frontend/src/components/MkUserSetupDialog.User.vue
index 746781d71f..4fbaf75454 100644
--- a/packages/frontend/src/components/MkUserSetupDialog.User.vue
+++ b/packages/frontend/src/components/MkUserSetupDialog.User.vue
@@ -13,7 +13,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 	</div>
 	<div :class="$style.description">
 		<div v-if="user.description" :class="$style.mfm">
-			<Mfm :text="user.description" :author="user" :i="$i"/>
+			<Mfm :text="user.description" :author="user"/>
 		</div>
 		<span v-else style="opacity: 0.7;">{{ i18n.ts.noAccountDescription }}</span>
 	</div>
diff --git a/packages/frontend/src/components/global/MkCustomEmoji.vue b/packages/frontend/src/components/global/MkCustomEmoji.vue
index 063b122f8b..1e17bab849 100644
--- a/packages/frontend/src/components/global/MkCustomEmoji.vue
+++ b/packages/frontend/src/components/global/MkCustomEmoji.vue
@@ -5,14 +5,27 @@ SPDX-License-Identifier: AGPL-3.0-only
 
 <template>
 <span v-if="errored">:{{ customEmojiName }}:</span>
-<img v-else :class="[$style.root, { [$style.normal]: normal, [$style.noStyle]: noStyle }]" :src="url" :alt="alt" :title="alt" decoding="async" @error="errored = true" @load="errored = false"/>
+<img
+	v-else
+	:class="[$style.root, { [$style.normal]: normal, [$style.noStyle]: noStyle }]"
+	:src="url"
+	:alt="alt"
+	:title="alt"
+	decoding="async"
+	@error="errored = true"
+	@load="errored = false"
+	@click="onClick"
+/>
 </template>
 
 <script lang="ts" setup>
-import { computed } from 'vue';
+import { computed, inject } from 'vue';
 import { getProxiedImageUrl, getStaticImageUrl } from '@/scripts/media-proxy.js';
 import { defaultStore } from '@/store.js';
 import { customEmojisMap } from '@/custom-emojis.js';
+import * as os from '@/os.js';
+import copyToClipboard from '@/scripts/copy-to-clipboard.js';
+import { i18n } from '@/i18n.js';
 
 const props = defineProps<{
 	name: string;
@@ -21,8 +34,12 @@ const props = defineProps<{
 	host?: string | null;
 	url?: string;
 	useOriginalSize?: boolean;
+	menu?: boolean;
+	menuReaction?: boolean;
 }>();
 
+const react = inject<((name: string) => void) | null>('react', null);
+
 const customEmojiName = computed(() => (props.name[0] === ':' ? props.name.substring(1, props.name.length - 1) : props.name).replace('@.', ''));
 const isLocal = computed(() => !props.host && (customEmojiName.value.endsWith('@.') || !customEmojiName.value.includes('@')));
 
@@ -55,6 +72,28 @@ const url = computed(() => {
 
 const alt = computed(() => `:${customEmojiName.value}:`);
 let errored = $ref(url.value == null);
+
+function onClick(ev: MouseEvent) {
+	if (props.menu) {
+		os.popupMenu([{
+			type: 'label',
+			text: `:${props.name}:`,
+		}, {
+			text: i18n.ts.copy,
+			icon: 'ti ti-copy',
+			action: () => {
+				copyToClipboard(`:${props.name}:`);
+				os.success();
+			},
+		}, ...(props.menuReaction && react ? [{
+			text: i18n.ts.doReaction,
+			icon: 'ti ti-plus',
+			action: () => {
+				react(`:${props.name}:`);
+			},
+		}] : [])], ev.currentTarget ?? ev.target);
+	}
+}
 </script>
 
 <style lang="scss" module>
diff --git a/packages/frontend/src/components/global/MkMisskeyFlavoredMarkdown.ts b/packages/frontend/src/components/global/MkMisskeyFlavoredMarkdown.ts
index ab8a342691..d7e1490502 100644
--- a/packages/frontend/src/components/global/MkMisskeyFlavoredMarkdown.ts
+++ b/packages/frontend/src/components/global/MkMisskeyFlavoredMarkdown.ts
@@ -33,12 +33,13 @@ type MfmProps = {
 	plain?: boolean;
 	nowrap?: boolean;
 	author?: Misskey.entities.UserLite;
-	i?: Misskey.entities.UserLite | null;
 	isNote?: boolean;
 	emojiUrls?: string[];
 	rootScale?: number;
 	nyaize: boolean | 'account';
 	parsedNodes?: mfm.MfmNode[] | null;
+	enableEmojiMenu?: boolean;
+	enableEmojiMenuReaction?: boolean;
 };
 
 // eslint-disable-next-line import/no-default-export
@@ -328,6 +329,8 @@ export default function(props: MfmProps) {
 						normal: props.plain,
 						host: null,
 						useOriginalSize: scale >= 2.5,
+						menu: props.enableEmojiMenu,
+						menuReaction: props.enableEmojiMenuReaction,
 					})];
 				} else {
 					// eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
diff --git a/packages/frontend/src/components/page/page.text.vue b/packages/frontend/src/components/page/page.text.vue
index 35021be95e..e0f1a4af90 100644
--- a/packages/frontend/src/components/page/page.text.vue
+++ b/packages/frontend/src/components/page/page.text.vue
@@ -5,7 +5,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 
 <template>
 <div class="_gaps">
-	<Mfm :text="block.text" :isNote="false" :i="$i"/>
+	<Mfm :text="block.text" :isNote="false"/>
 	<MkUrlPreview v-for="url in urls" :key="url" :url="url"/>
 </div>
 </template>
diff --git a/packages/frontend/src/pages/channel.vue b/packages/frontend/src/pages/channel.vue
index 911f4e95d2..1d41fe7529 100644
--- a/packages/frontend/src/pages/channel.vue
+++ b/packages/frontend/src/pages/channel.vue
@@ -21,7 +21,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 					<div :class="$style.bannerFade"></div>
 				</div>
 				<div v-if="channel.description" :class="$style.description">
-					<Mfm :text="channel.description" :isNote="false" :i="$i"/>
+					<Mfm :text="channel.description" :isNote="false"/>
 				</div>
 			</div>
 
diff --git a/packages/frontend/src/pages/clip.vue b/packages/frontend/src/pages/clip.vue
index 80b94acb6b..4573bbb81c 100644
--- a/packages/frontend/src/pages/clip.vue
+++ b/packages/frontend/src/pages/clip.vue
@@ -10,7 +10,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 		<div v-if="clip" class="_gaps">
 			<div class="_panel">
 				<div v-if="clip.description" :class="$style.description">
-					<Mfm :text="clip.description" :isNote="false" :i="$i"/>
+					<Mfm :text="clip.description" :isNote="false"/>
 				</div>
 				<MkButton v-if="favorited" v-tooltip="i18n.ts.unfavorite" asLike rounded primary @click="unfavorite()"><i class="ti ti-heart"></i><span v-if="clip.favoritedCount > 0" style="margin-left: 6px;">{{ clip.favoritedCount }}</span></MkButton>
 				<MkButton v-else v-tooltip="i18n.ts.favorite" asLike rounded @click="favorite()"><i class="ti ti-heart"></i><span v-if="clip.favoritedCount > 0" style="margin-left: 6px;">{{ clip.favoritedCount }}</span></MkButton>
diff --git a/packages/frontend/src/pages/user/home.vue b/packages/frontend/src/pages/user/home.vue
index 4c425898d5..7ff490bf8b 100644
--- a/packages/frontend/src/pages/user/home.vue
+++ b/packages/frontend/src/pages/user/home.vue
@@ -76,7 +76,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 					</div>
 					<div class="description">
 						<MkOmit>
-							<Mfm v-if="user.description" :text="user.description" :isNote="false" :author="user" :i="$i"/>
+							<Mfm v-if="user.description" :text="user.description" :isNote="false" :author="user"/>
 							<p v-else class="empty">{{ i18n.ts.noAccountDescription }}</p>
 						</MkOmit>
 					</div>
@@ -100,7 +100,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 								<Mfm :text="field.name" :plain="true" :colored="false"/>
 							</dt>
 							<dd class="value">
-								<Mfm :text="field.value" :author="user" :i="$i" :colored="false"/>
+								<Mfm :text="field.value" :author="user" :colored="false"/>
 								<i v-if="user.verifiedLinks.includes(field.value)" v-tooltip:dialog="i18n.ts.verifiedLink" class="ti ti-circle-check" :class="$style.verifiedLink"></i>
 							</dd>
 						</dl>
diff --git a/packages/frontend/src/pages/welcome.timeline.vue b/packages/frontend/src/pages/welcome.timeline.vue
index f2e151468a..8e2192074d 100644
--- a/packages/frontend/src/pages/welcome.timeline.vue
+++ b/packages/frontend/src/pages/welcome.timeline.vue
@@ -10,7 +10,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 			<div class="_panel" :class="$style.content">
 				<div>
 					<MkA v-if="note.replyId" class="reply" :to="`/notes/${note.replyId}`"><i class="ti ti-arrow-back-up"></i></MkA>
-					<Mfm v-if="note.text" :text="note.text" :author="note.user" :i="$i"/>
+					<Mfm v-if="note.text" :text="note.text" :author="note.user"/>
 					<MkA v-if="note.renoteId" class="rp" :to="`/notes/${note.renoteId}`">RN: ...</MkA>
 				</div>
 				<div v-if="note.files.length > 0" :class="$style.richcontent">