Black Mark

A character from Megami Ibunroku Persona.

Maddened Dancer
A Japanese exchange student who suffered an unfortunate accident on a tar factory. Said accident also caused brain damage, explaining his "change of personality".

Season 3
A student from Japan who puts on an African-American costume when fighting in the ring, he's come to fight in TFR before going back to Japan and playing this strange "Persona" game with his friends. Surely nothing strange can come out of that.