No, not really -- I mean, I can't say with complete certainty. I know he wasn't always like that, obviously, but even into his adult life. I know he had a life before that.

But the catalyst? [Eddie shrugs, his mouth quirking into a frown.] We hear a lot of rumors. Esoteric connections. He may have been a chemist, beforehand. He may have always been manic depressive.

[Beat...] He has superficial similarities to Gamzee.