You probably do. It's a common mistake and I probably would have made it too when I first drew him if not for running into fanart specifically aimed toward it. Ghirahim would drive Death the Kid crazy. No symmetry. None.
This is a really nice style here. I love the way you drew their faces. It makes them look more serious, almost like the Twilight Princess game's art. I need to finish Skyward Sword game before I get spoiled later on!lol