やってみまひたがエラー内容は変わりまふぇんね(^^
Player頭 = Player.transform.Find("頭").gameObject;
Player胴 = Player.transform.Find("胴").gameObject;
Player腰 = Player.transform.Find("腰").gameObject;
Player足 = Player.transform.Find("足").gameObject;
Player髪 = Player.transform.Find("髪").gameObject;
ここがヌルッてまふ(^^