I think what kinda bothers me is how I still have yet to see the answer character in the actual mirror itself. And I threw my good friend Photoshop at that picture for literally hours. Literally.
If it were not for the newest hint (which... thank god I can read music tbh, yay years of piano and violin) and for this being a submit multiple guesses format question, I doubt I would have gotten the answer from just the given information and image.
I think I'll have a little more to say once the solution is posted, but yeah. Justin (I assume) pls nerf...