diff --git a/packages/frontend/assets/room/objects/mixer/body.af b/packages/frontend/assets/room/objects/mixer/body.af
new file mode 100644
index 0000000000..787bd92be5
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diff --git a/packages/frontend/assets/room/objects/mixer/mixer.blend b/packages/frontend/assets/room/objects/mixer/mixer.blend
new file mode 100644
index 0000000000..327f7cdcaf
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diff --git a/packages/frontend/assets/room/objects/mixer/mixer.glb b/packages/frontend/assets/room/objects/mixer/mixer.glb
new file mode 100644
index 0000000000..0df428a29c
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diff --git a/packages/frontend/assets/room/objects/mixer/textures/body.png b/packages/frontend/assets/room/objects/mixer/textures/body.png
new file mode 100644
index 0000000000..3c969b7e38
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diff --git a/packages/frontend/assets/room/objects/mixer/uv.png b/packages/frontend/assets/room/objects/mixer/uv.png
new file mode 100644
index 0000000000..5aaf2e85a8
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diff --git a/packages/frontend/src/utility/room/engine.ts b/packages/frontend/src/utility/room/engine.ts
index 59e959d80b..4d431054cc 100644
--- a/packages/frontend/src/utility/room/engine.ts
+++ b/packages/frontend/src/utility/room/engine.ts
@@ -1102,19 +1102,29 @@ export class RoomEngine {
 		}
 	}
 
-	private createGhost(mesh: BABYLON.Mesh) {
+	private createGhost(mesh: BABYLON.Mesh): BABYLON.Mesh {
 		const ghost = mesh.clone('ghost', null, false)!;
 		ghost.metadata = { isGhost: true };
+
+		const materials = new WeakMap<BABYLON.Material, BABYLON.Material>();
+
 		for (const m of ghost.getChildMeshes()) {
 			m.metadata = { isGhost: true };
-			if (m.material) {
-				const mat = m.material.clone(`${m.material.name}_ghost`);
-				mat.alpha = 0.3;
-				mat.transparencyMode = BABYLON.Material.MATERIAL_ALPHABLEND;
-				m.material = mat;
-			}
 			m.checkCollisions = false;
+
+			if (m.material) {
+				if (materials.has(m.material)) {
+					m.material = materials.get(m.material)!;
+				} else {
+					const mat = m.material.clone(`${m.material.name}_ghost`);
+					mat.alpha = 0.3;
+					mat.transparencyMode = BABYLON.Material.MATERIAL_ALPHABLEND;
+					materials.set(m.material, mat);
+					m.material = mat;
+				}
+			}
 		}
+
 		return ghost;
 	}
 
diff --git a/packages/frontend/src/utility/room/object-defs.ts b/packages/frontend/src/utility/room/object-defs.ts
index b09d81681d..5326e4a819 100644
--- a/packages/frontend/src/utility/room/object-defs.ts
+++ b/packages/frontend/src/utility/room/object-defs.ts
@@ -23,6 +23,7 @@ import { keyboard } from './objects/keyboard.js';
 import { lavaLamp } from './objects/lavaLamp.js';
 import { letterCase } from './objects/letterCase.js';
 import { milk } from './objects/milk.js';
+import { mixer } from './objects/mixer.js';
 import { monitor } from './objects/monitor.js';
 import { monstera } from './objects/monstera.js';
 import { mug } from './objects/mug.js';
@@ -64,6 +65,7 @@ export const OBJECT_DEFS = [
 	lavaLamp,
 	letterCase,
 	milk,
+	mixer,
 	monitor,
 	monstera,
 	mug,
diff --git a/packages/frontend/src/utility/room/objects/mixer.ts b/packages/frontend/src/utility/room/objects/mixer.ts
new file mode 100644
index 0000000000..6511a580b2
--- /dev/null
+++ b/packages/frontend/src/utility/room/objects/mixer.ts
@@ -0,0 +1,21 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { defineObject } from '../engine.js';
+
+export const mixer = defineObject({
+	id: 'mixer',
+	name: 'Mixer',
+	options: {
+		schema: {},
+		default: {},
+	},
+	placement: 'top',
+	createInstance: () => {
+		return {
+			interactions: {},
+		};
+	},
+});