diff --git a/packages/backend/src/server/api/endpoints/i/notifications-grouped.ts b/packages/backend/src/server/api/endpoints/i/notifications-grouped.ts
index 22320c75aa..4ea94b07f6 100644
--- a/packages/backend/src/server/api/endpoints/i/notifications-grouped.ts
+++ b/packages/backend/src/server/api/endpoints/i/notifications-grouped.ts
@@ -149,7 +149,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 							id: '',
 							createdAt: notification.createdAt,
 							noteId: prev.noteId!,
-							userIds: [],
+							userIds: [prev.notifierId!],
 						};
 						prevGroupedNotification = groupedNotifications.at(-1)!;
 					}
diff --git a/packages/frontend/src/components/MkNotification.vue b/packages/frontend/src/components/MkNotification.vue
index 8e770fde8c..ff20bc591f 100644
--- a/packages/frontend/src/components/MkNotification.vue
+++ b/packages/frontend/src/components/MkNotification.vue
@@ -9,9 +9,11 @@ SPDX-License-Identifier: AGPL-3.0-only
 		<MkAvatar v-if="notification.type === 'pollEnded'" :class="$style.icon" :user="notification.note.user" link preview/>
 		<MkAvatar v-else-if="notification.type === 'note'" :class="$style.icon" :user="notification.note.user" link preview/>
 		<MkAvatar v-else-if="notification.type === 'achievementEarned'" :class="$style.icon" :user="$i" link preview/>
+		<div v-else-if="notification.type === 'reaction:grouped'" :class="[$style.icon, $style.icon_reactionGroup]"><i class="ti ti-plus" style="line-height: 1;"></i></div>
+		<div v-else-if="notification.type === 'renote:grouped'" :class="[$style.icon, $style.icon_renoteGroup]"><i class="ti ti-repeat" style="line-height: 1;"></i></div>
 		<img v-else-if="notification.type === 'test'" :class="$style.icon" :src="infoImageUrl"/>
 		<MkAvatar v-else-if="notification.user" :class="$style.icon" :user="notification.user" link preview/>
-		<img v-else-if="notification.icon" :class="$style.icon" :src="notification.icon" alt=""/>
+		<img v-else-if="notification.icon" :class="[$style.icon, $style.icon_app]" :src="notification.icon" alt=""/>
 		<div
 			:class="[$style.subIcon, {
 				[$style.t_follow]: notification.type === 'follow',
@@ -52,6 +54,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 			<span v-else-if="notification.type === 'test'">{{ i18n.ts._notification.testNotification }}</span>
 			<MkA v-else-if="notification.user" v-user-preview="notification.user.id" :class="$style.headerName" :to="userPage(notification.user)"><MkUserName :user="notification.user"/></MkA>
 			<span v-else-if="notification.type === 'reaction:grouped'">{{ i18n.t('_notification.reactedBySomeUsers', { n: notification.reactions.length }) }}</span>
+			<span v-else-if="notification.type === 'renote:grouped'">{{ i18n.t('_notification.renotedBySomeUsers', { n: notification.users.length }) }}</span>
 			<span v-else>{{ notification.header }}</span>
 			<MkTime v-if="withTime" :time="notification.createdAt" :class="$style.headerTime"/>
 		</header>
@@ -61,7 +64,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 				<Mfm :text="getNoteSummary(notification.note)" :plain="true" :nowrap="true" :author="notification.note.user"/>
 				<i class="ti ti-quote" :class="$style.quote"></i>
 			</MkA>
-			<MkA v-else-if="notification.type === 'renote'" :class="$style.text" :to="notePage(notification.note)" :title="getNoteSummary(notification.note.renote)">
+			<MkA v-else-if="notification.type === 'renote' || notification.type === 'renote:grouped'" :class="$style.text" :to="notePage(notification.note)" :title="getNoteSummary(notification.note.renote)">
 				<i class="ti ti-quote" :class="$style.quote"></i>
 				<Mfm :text="getNoteSummary(notification.note.renote)" :plain="true" :nowrap="true" :author="notification.note.renote.user"/>
 				<i class="ti ti-quote" :class="$style.quote"></i>
@@ -199,6 +202,29 @@ useTooltip(reactionRef, (showing) => {
 	display: block;
 	width: 100%;
 	height: 100%;
+}
+
+.icon_reactionGroup,
+.icon_renoteGroup {
+	display: grid;
+	align-items: center;
+	justify-items: center;
+	width: 80%;
+	height: 80%;
+	font-size: 15px;
+	border-radius: 100%;
+	color: #fff;
+}
+
+.icon_reactionGroup {
+	background: #e99a0b;
+}
+
+.icon_renoteGroup {
+	background: #36d298;
+}
+
+.icon_app {
 	border-radius: 6px;
 }