I feel like I remember someone morphing into another person once in the books, or maybe he was changing into a combination of two other people to hide an identity or something, but its been years as I read them as they first came out starting in book 1... I think that might get a little too funky though if not god-modey, and it was later in the books not early on.

I will submit my character as options for either smart guy or heart, then. He can easily be either. I think I would prefer heart though because he's musically inclined.