diff --git a/Assets/UniGLTF/Runtime/UniHumanoid/AvatarDescription.cs b/Assets/UniGLTF/Runtime/UniHumanoid/AvatarDescription.cs
index c3412d014..23a91c19b 100644
--- a/Assets/UniGLTF/Runtime/UniHumanoid/AvatarDescription.cs
+++ b/Assets/UniGLTF/Runtime/UniHumanoid/AvatarDescription.cs
@@ -273,12 +273,16 @@ namespace UniHumanoid
         }
 #endif
 
-        public static void AddAnimator(GameObject _src,
+        public static Avatar CreateAvatarForCopyHierarchy(
+            Animator src,
             GameObject dst,
             IDictionary<Transform, Transform> boneMap,
             Action<AvatarDescription> modAvatarDesc = null)
         {
-            var src = _src.GetComponent<Animator>();
+            if (src == null)
+            {
+                throw new ArgumentNullException("src");
+            }
 
             var srcHumanBones = CachedEnum.GetValues<HumanBodyBones>()
                 .Where(x => x != HumanBodyBones.LastBone)
@@ -292,12 +296,6 @@ namespace UniHumanoid
                    .ToDictionary(x => x.Key, x => boneMap[x.Value])
                    ;
 
-            var animator = dst.AddComponent<Animator>();
-            if (animator == null)
-            {
-                animator = dst.AddComponent<Animator>();
-            }
-
             var avatarDescription = UniHumanoid.AvatarDescription.Create();
             if (modAvatarDesc != null)
             {
@@ -305,9 +303,8 @@ namespace UniHumanoid
             }
             avatarDescription.SetHumanBones(map);
             var avatar = avatarDescription.CreateAvatar(dst.transform);
-
-            avatar.name = dst.name;
-            animator.avatar = avatar;
+            avatar.name = "created";
+            return avatar;
         }
     }
 }
\ No newline at end of file
diff --git a/Assets/VRM/Runtime/SkinnedMeshUtility/VRMBoneNormalizer.cs b/Assets/VRM/Runtime/SkinnedMeshUtility/VRMBoneNormalizer.cs
index 56fcca10b..3f5dcf927 100644
--- a/Assets/VRM/Runtime/SkinnedMeshUtility/VRMBoneNormalizer.cs
+++ b/Assets/VRM/Runtime/SkinnedMeshUtility/VRMBoneNormalizer.cs
@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using UniGLTF;
 using UniGLTF.MeshUtility;
 using UniGLTF.Utils;
 using UniHumanoid;
@@ -69,7 +70,8 @@ namespace VRM
             var (normalized, bMap) = BoneNormalizer.Execute(go);
 
             // 新しいヒエラルキーからAvatarを作る
-            UniHumanoid.AvatarDescription.AddAnimator(go, normalized, bMap, avatarDescription =>
+            var newAvatar = UniHumanoid.AvatarDescription.CreateAvatarForCopyHierarchy(
+                go.GetComponent<Animator>(), normalized, bMap, avatarDescription =>
             {
                 var vrmHuman = go.GetComponent<VRMHumanoidDescription>();
                 if (vrmHuman != null && vrmHuman.Description != null)
@@ -84,6 +86,8 @@ namespace VRM
                     avatarDescription.hasTranslationDoF = vrmHuman.Description.hasTranslationDoF;
                 }
             });
+            var newAnimator = normalized.GetOrAddComponent<Animator>();
+            newAnimator.avatar = newAvatar;
 
             CopyVRMComponents(go, normalized, bMap);
 
diff --git a/Assets/VRM10/Runtime/MeshUtility/Vrm10MeshUtility.cs b/Assets/VRM10/Runtime/MeshUtility/Vrm10MeshUtility.cs
index da612bee9..883bfc674 100644
--- a/Assets/VRM10/Runtime/MeshUtility/Vrm10MeshUtility.cs
+++ b/Assets/VRM10/Runtime/MeshUtility/Vrm10MeshUtility.cs
@@ -133,7 +133,9 @@ namespace UniVRM10
             // TODO: update: constraint
             // TODO: update: firstPoint offset
 
-            AvatarDescription.AddAnimator(go, normalized, boneMap);
+            var newAvatar = AvatarDescription.CreateAvatarForCopyHierarchy(go.GetComponent<Animator>(), normalized, boneMap);
+            var newAnimator = normalized.GetOrAddComponent<Animator>();
+            newAnimator.avatar = newAvatar;
 
             // TODO: write back normalized transform to boneMap
         }