Donny's quite the sadistic personality, even masochistic at times. He was beaten by his father when he was small until a particular blow to the head smacked him into crazy town.
He has a very twisted sense of right and wrong, whacked out morals, and is practically inept at feeling a wide range of emotions, particularly compassion, love, and any close attachments to other people. He is heavily driven by fear. That is, he aims to destroy what he's afraid of so that he can live a life without fears and make the most of his strength.
He works at the Silch Facility, a place of torture with morals nearly as skewed as his own, and greatly enjoys his line of work although he's seen as little more than a slave.
Donny and "Guilt" are mine.
Drawn on SAI.
Link
Yangyexin
DONNY MY GOOD FELLOW