Black is a young man who aspires to be the Champion of the Unova Pokémon League. He has been dreaming of this since childhood, these dreams fill his head to the point where he cannot think about anything else and he'll pass out from mental exhaustion. With his Musha, Black can have him eat his dreams, which he refers to turning his mind from "blank white" to "solid black". This helps him think more clearly and such.
Black is often reckless.
He has an Emboar
He's friends with White and Bianca