diff --git a/assets/ui-icons.afdesign b/assets/ui-icons.afdesign
index e36bfcd3ca..39abf1dd4f 100644
Binary files a/assets/ui-icons.afdesign and b/assets/ui-icons.afdesign differ
diff --git a/packages/frontend/src/components/MkDialog.vue b/packages/frontend/src/components/MkDialog.vue
index 81d508c161..3f7519a43f 100644
--- a/packages/frontend/src/components/MkDialog.vue
+++ b/packages/frontend/src/components/MkDialog.vue
@@ -11,18 +11,13 @@ SPDX-License-Identifier: AGPL-3.0-only
 		</div>
 		<div
 			v-else-if="!input && !select"
-			:class="[$style.icon, {
-				[$style.type_success]: type === 'success',
-				[$style.type_error]: type === 'error',
-				[$style.type_warning]: type === 'warning',
-				[$style.type_info]: type === 'info',
-			}]"
+			:class="[$style.icon]"
 		>
-			<i v-if="type === 'success'" :class="$style.iconInner" class="ti ti-check"></i>
-			<i v-else-if="type === 'error'" :class="$style.iconInner" class="ti ti-circle-x"></i>
-			<i v-else-if="type === 'warning'" :class="$style.iconInner" class="ti ti-alert-triangle"></i>
-			<i v-else-if="type === 'info'" :class="$style.iconInner" class="ti ti-info-circle"></i>
-			<i v-else-if="type === 'question'" :class="$style.iconInner" class="ti ti-help-circle"></i>
+			<MkSystemIcon v-if="type === 'success'" :class="$style.iconInner" style="width: 45px;" type="success"/>
+			<MkSystemIcon v-else-if="type === 'error'" :class="$style.iconInner" style="width: 45px;" type="error"/>
+			<MkSystemIcon v-else-if="type === 'warning'" :class="$style.iconInner" style="width: 45px;" type="warn"/>
+			<MkSystemIcon v-else-if="type === 'info'" :class="$style.iconInner" style="width: 45px;" type="info"/>
+			<MkSystemIcon v-else-if="type === 'question'" :class="$style.iconInner" style="width: 45px;" type="question"/>
 			<MkLoading v-else-if="type === 'waiting'" :class="$style.iconInner" :em="true"/>
 		</div>
 		<header v-if="title" :class="$style.title" class="_selectable"><Mfm :text="title"/></header>
@@ -202,22 +197,6 @@ function onInputKeydown(evt: KeyboardEvent) {
 	margin: 0 auto;
 }
 
-.type_info {
-	color: #55c4dd;
-}
-
-.type_success {
-	color: var(--MI_THEME-success);
-}
-
-.type_error {
-	color: var(--MI_THEME-error);
-}
-
-.type_warning {
-	color: var(--MI_THEME-warn);
-}
-
 .title {
 	margin: 0 0 8px 0;
 	font-weight: bold;
diff --git a/packages/frontend/src/components/global/MkResult.vue b/packages/frontend/src/components/global/MkResult.vue
index 0cba254358..fdfc7091e8 100644
--- a/packages/frontend/src/components/global/MkResult.vue
+++ b/packages/frontend/src/components/global/MkResult.vue
@@ -5,43 +5,13 @@ SPDX-License-Identifier: AGPL-3.0-only
 
 <template>
 <Transition :name="prefer.s.animation ? '_transition_zoom' : ''" appear>
-	<div :class="[$style.root, { [$style.warn]: type === 'notFound', [$style.error]: type === 'error' }]" class="_gaps_m">
+	<div :class="[$style.root, { [$style.warn]: type === 'notFound', [$style.error]: type === 'error' }]" class="_gaps">
 		<img v-if="type === 'empty' && instance.infoImageUrl" :src="instance.infoImageUrl" draggable="false" :class="$style.img"/>
-		<svg v-else-if="type === 'empty'" :class="$style.icon" viewBox="0 0 128 128" style="stroke-linecap:round;stroke-linejoin:round;">
-			<g transform="matrix(1,0,0,0.9,0,12.8)">
-				<path d="M64,88L64,48" style="fill:none;stroke:currentColor;stroke-width:8.41px;"/>
-			</g>
-			<g transform="matrix(1,0,0,1,-4,8)">
-				<circle cx="68" cy="28" r="4" style="fill:currentColor;"/>
-			</g>
-			<g transform="matrix(0.875,0,0,0.875,8,8)">
-				<circle cx="64" cy="64" r="64" style="fill:none;stroke:currentColor;stroke-width:9.14px;"/>
-			</g>
-		</svg>
+		<MkSystemIcon v-else-if="type === 'empty'" type="info" :class="$style.icon"/>
 		<img v-if="type === 'notFound' && instance.notFoundImageUrl" :src="instance.notFoundImageUrl" draggable="false" :class="$style.img"/>
-		<svg v-else-if="type === 'notFound'" :class="$style.icon" viewBox="0 0 128 128" style="stroke-linecap:round;stroke-linejoin:round;">
-			<g transform="matrix(1,0,0,1,0,12)">
-				<path d="M64,64L64,56C72.533,55.777 80,49.333 80,40C80,31.667 73.333,24 64,24C55.667,24 47.556,31.667 48,40" style="fill:none;stroke:currentColor;stroke-width:8px;"/>
-			</g>
-			<g transform="matrix(1,0,0,1,-4,64)">
-				<circle cx="68" cy="28" r="4" style="fill:currentColor;"/>
-			</g>
-			<g transform="matrix(0.875,0,0,0.875,8,8)">
-				<circle cx="64" cy="64" r="64" style="fill:none;stroke:currentColor;stroke-width:9.14px;"/>
-			</g>
-		</svg>
+		<MkSystemIcon v-else-if="type === 'notFound'" type="question" :class="$style.icon"/>
 		<img v-if="type === 'error' && instance.serverErrorImageUrl" :src="instance.serverErrorImageUrl" draggable="false" :class="$style.img"/>
-		<svg v-else-if="type === 'error'" :class="$style.icon" viewBox="0 0 128 128" style="stroke-linecap:round;stroke-linejoin:round;">
-			<g transform="matrix(0.707107,0.707107,-0.636396,0.636396,62.0201,-24.5298)">
-				<path d="M64,94.667L64,41.333" style="fill:none;stroke:currentColor;stroke-width:8.41px;"/>
-			</g>
-			<g transform="matrix(0.707107,-0.707107,0.636396,0.636396,-24.5298,65.9799)">
-				<path d="M64,94.667L64,41.333" style="fill:none;stroke:currentColor;stroke-width:8.41px;"/>
-			</g>
-			<g transform="matrix(0.875,0,0,0.875,8,8)">
-				<circle cx="64" cy="64" r="64" style="fill:none;stroke:currentColor;stroke-width:9.14px;"/>
-			</g>
-		</svg>
+		<MkSystemIcon v-else-if="type === 'error'" type="error" :class="$style.icon"/>
 
 		<div style="opacity: 0.7;">{{ props.text ?? (type === 'empty' ? i18n.ts.nothing : type === 'notFound' ? i18n.ts.notFound : type === 'error' ? i18n.ts.somethingHappened : null) }}</div>
 		<slot></slot>
@@ -66,18 +36,6 @@ const props = defineProps<{
 	position: relative;
 	text-align: center;
 	padding: 32px;
-
-	&.error {
-		.icon {
-			color: var(--MI_THEME-error);
-		}
-	}
-
-	&.warn {
-		.icon {
-			color: var(--MI_THEME-warn);
-		}
-	}
 }
 
 .img {
@@ -88,9 +46,8 @@ const props = defineProps<{
 }
 
 .icon {
-	width: 64px;
-	height: 64px;
+	width: 65px;
+	height: 65px;
 	margin: 0 auto;
-	color: var(--MI_THEME-accent);
 }
 </style>
diff --git a/packages/frontend/src/components/global/MkSystemIcon.vue b/packages/frontend/src/components/global/MkSystemIcon.vue
new file mode 100644
index 0000000000..3285d5a940
--- /dev/null
+++ b/packages/frontend/src/components/global/MkSystemIcon.vue
@@ -0,0 +1,109 @@
+<!--
+SPDX-FileCopyrightText: syuilo and misskey-project
+SPDX-License-Identifier: AGPL-3.0-only
+-->
+
+<template>
+<svg v-if="type === 'info'" :class="[$style.icon, $style.info]" viewBox="0 0 160 160">
+	<path d="M80,108L80,72" style="--l:37;" :class="[$style.line, $style.anim]"/>
+	<path d="M80,52L80,52" :class="[$style.line, $style.fade]"/>
+	<circle cx="80" cy="80" r="56" style="--l:350;" :class="[$style.line, $style.anim]"/>
+</svg>
+<svg v-else-if="type === 'question'" :class="[$style.icon, $style.question]" viewBox="0 0 160 160">
+	<path d="M80,92L79.991,84C88.799,83.98 96,76.962 96,68C96,59.038 88.953,52 79.991,52C71.03,52 64,59.038 64,68" style="--l:85;" :class="[$style.line, $style.anim]"/>
+	<path d="M80,108L80,108" :class="[$style.line, $style.fade]"/>
+	<circle cx="80" cy="80" r="56" style="--l:350;" :class="[$style.line, $style.anim]"/>
+</svg>
+<svg v-else-if="type === 'success'" :class="[$style.icon, $style.success]" viewBox="0 0 160 160">
+	<path d="M62,80L74,92L98,68" style="--l:50;" :class="[$style.line, $style.anim]"/>
+	<circle cx="80" cy="80" r="56" style="--l:350;" :class="[$style.line, $style.anim]"/>
+</svg>
+<svg v-else-if="type === 'warn'" :class="[$style.icon, $style.warn]" viewBox="0 0 160 160">
+	<path d="M80,64L80,88" style="--l:27;" :class="[$style.line, $style.anim]"/>
+	<path d="M80,108L80,108" :class="[$style.line, $style.fade]"/>
+	<path d="M92,28L144,116C148.709,124.65 144.083,135.82 136,136L24,136C15.917,135.82 11.291,124.65 16,116L68,28C73.498,19.945 86.771,19.945 92,28Z" style="--l:390;" :class="[$style.line, $style.anim]"/>
+</svg>
+<svg v-else-if="type === 'error'" :class="[$style.icon, $style.error]" viewBox="0 0 160 160">
+	<path d="M63,63L96,96" style="--l:47;--duration:0.3s;" :class="[$style.line, $style.anim]"/>
+	<path d="M96,63L63,96" style="--l:47;--duration:0.3s;--delay:0.2s;" :class="[$style.line, $style.anim]"/>
+	<circle cx="80" cy="80" r="56" style="--l:350;" :class="[$style.line, $style.anim]"/>
+</svg>
+</template>
+
+<script lang="ts" setup>
+import {} from 'vue';
+
+const props = defineProps<{
+	type: 'info' | 'question' | 'success' | 'warn' | 'error';
+}>();
+</script>
+
+<style lang="scss" module>
+.icon {
+	stroke-linecap: round;
+	stroke-linejoin: round;
+
+	&.info {
+		color: var(--MI_THEME-accent);
+	}
+
+	&.question {
+		color: var(--MI_THEME-fg);
+	}
+
+	&.success {
+		color: var(--MI_THEME-success);
+	}
+
+	&.warn {
+		color: var(--MI_THEME-warn);
+	}
+
+	&.error {
+		color: var(--MI_THEME-error);
+	}
+}
+
+.line {
+	fill: none;
+	stroke: currentColor;
+	stroke-width: 8px;
+}
+
+.fill {
+	fill: currentColor;
+}
+
+.anim {
+	stroke-dasharray: var(--l);
+	stroke-dashoffset: var(--l);
+	animation: line-animation var(--duration, 0.5s) cubic-bezier(0,0,.25,1) 1 forwards;
+	animation-delay: var(--delay, 0s);
+}
+
+.fade {
+	opacity: 0;
+	animation: fade-in var(--duration, 0.5s) cubic-bezier(0,0,.25,1) 1 forwards;
+	animation-delay: var(--delay, 0s);
+}
+
+@keyframes line-animation {
+	0% {
+		stroke-dashoffset: var(--l);
+		opacity: 0;
+	}
+	100% {
+		stroke-dashoffset: 0;
+		opacity: 1;
+	}
+}
+
+@keyframes fade-in {
+	0% {
+		opacity: 0;
+	}
+	100% {
+		opacity: 1;
+	}
+}
+</style>
diff --git a/packages/frontend/src/components/index.ts b/packages/frontend/src/components/index.ts
index 33d3532c1d..9981772ae8 100644
--- a/packages/frontend/src/components/index.ts
+++ b/packages/frontend/src/components/index.ts
@@ -25,6 +25,7 @@ import MkPageHeader from './global/MkPageHeader.vue';
 import MkStickyContainer from './global/MkStickyContainer.vue';
 import MkLazy from './global/MkLazy.vue';
 import MkResult from './global/MkResult.vue';
+import MkSystemIcon from './global/MkSystemIcon.vue';
 import PageWithHeader from './global/PageWithHeader.vue';
 import PageWithAnimBg from './global/PageWithAnimBg.vue';
 import SearchMarker from './global/SearchMarker.vue';
@@ -63,6 +64,7 @@ export const components = {
 	MkStickyContainer: MkStickyContainer,
 	MkLazy: MkLazy,
 	MkResult: MkResult,
+	MkSystemIcon: MkSystemIcon,
 	PageWithHeader: PageWithHeader,
 	PageWithAnimBg: PageWithAnimBg,
 	SearchMarker: SearchMarker,
@@ -95,6 +97,7 @@ declare module '@vue/runtime-core' {
 		MkStickyContainer: typeof MkStickyContainer;
 		MkLazy: typeof MkLazy;
 		MkResult: typeof MkResult;
+		MkSystemIcon: typeof MkSystemIcon;
 		PageWithHeader: typeof PageWithHeader;
 		PageWithAnimBg: typeof PageWithAnimBg;
 		SearchMarker: typeof SearchMarker;
diff --git a/packages/frontend/src/pages/debug.vue b/packages/frontend/src/pages/debug.vue
new file mode 100644
index 0000000000..4dae1b57a9
--- /dev/null
+++ b/packages/frontend/src/pages/debug.vue
@@ -0,0 +1,66 @@
+<!--
+SPDX-FileCopyrightText: syuilo and misskey-project
+SPDX-License-Identifier: AGPL-3.0-only
+-->
+
+<template>
+<PageWithHeader>
+	<div class="_spacer" style="--MI_SPACER-w: 600px;">
+		<div class="_gaps_m">
+			<MkResult v-if="resultType === 'empty'" type="empty"/>
+			<MkResult v-if="resultType === 'notFound'" type="notFound"/>
+			<MkResult v-if="resultType === 'error'" type="error"/>
+			<MkSelect
+				v-model="resultType" :items="[
+					{ label: 'empty', value: 'empty' },
+					{ label: 'notFound', value: 'notFound' },
+					{ label: 'error', value: 'error' },
+				]"
+			></MkSelect>
+
+			<MkSystemIcon v-if="iconType === 'info'" type="info" style="width: 60px;"/>
+			<MkSystemIcon v-if="iconType === 'question'" type="question" style="width: 60px;"/>
+			<MkSystemIcon v-if="iconType === 'success'" type="success" style="width: 60px;"/>
+			<MkSystemIcon v-if="iconType === 'warn'" type="warn" style="width: 60px;"/>
+			<MkSystemIcon v-if="iconType === 'error'" type="error" style="width: 60px;"/>
+			<MkSelect
+				v-model="iconType" :items="[
+					{ label: 'info', value: 'info' },
+					{ label: 'question', value: 'question' },
+					{ label: 'success', value: 'success' },
+					{ label: 'warn', value: 'warn' },
+					{ label: 'error', value: 'error' },
+				]"
+			></MkSelect>
+
+			<div class="_buttons">
+				<MkButton @click="os.alert({ type: 'error', title: 'Error', text: 'error' })">Error</MkButton>
+				<MkButton @click="os.alert({ type: 'warning', title: 'Warning', text: 'warning' })">Warning</MkButton>
+				<MkButton @click="os.alert({ type: 'info', title: 'Info', text: 'info' })">Info</MkButton>
+				<MkButton @click="os.alert({ type: 'success', title: 'Success', text: 'success' })">Success</MkButton>
+				<MkButton @click="os.alert({ type: 'question', title: 'Question', text: 'question' })">Question</MkButton>
+			</div>
+		</div>
+	</div>
+</PageWithHeader>
+</template>
+
+<script lang="ts" setup>
+import { ref } from 'vue';
+import { i18n } from '@/i18n.js';
+import { instance } from '@/instance.js';
+import { definePage } from '@/page.js';
+import MkKeyValue from '@/components/MkKeyValue.vue';
+import MkLink from '@/components/MkLink.vue';
+import MkSelect from '@/components/MkSelect.vue';
+import MkButton from '@/components/MkButton.vue';
+import * as os from '@/os.js';
+
+const resultType = ref('empty');
+const iconType = ref('info');
+
+definePage(() => ({
+	title: 'DEBUG ROOM',
+	icon: 'ti ti-help-circle',
+}));
+</script>
diff --git a/packages/frontend/src/router.definition.ts b/packages/frontend/src/router.definition.ts
index 462b8e713f..5e0e6f7286 100644
--- a/packages/frontend/src/router.definition.ts
+++ b/packages/frontend/src/router.definition.ts
@@ -591,6 +591,10 @@ export const ROUTE_DEF = [{
 	path: '/reversi/g/:gameId',
 	component: page(() => import('@/pages/reversi/game.vue')),
 	loginRequired: false,
+}, {
+	path: '/debug',
+	component: page(() => import('@/pages/debug.vue')),
+	loginRequired: false,
 }, {
 	// テスト用リダイレクト設定。ログイン中ユーザのプロフィールにリダイレクトする
 	path: '/redirect-test',