A dangerous psychopath who likes to think he's more civilized than the rest of the world.
Damian is almost always calm and collected, acting civilized and arrogant when he has no reason to hide his true personality. As a psychopath he is unable to understand the emotions of others or care about them. A human life has no significant value in his eyes and only serve to amuse him. When he needs to he can act like a normal person and pretend to care. When it's not needed he speaks in a creepy monotone to unnerve the people around him.
Damian grew up in the lowest rungs of society. He never planned to be a murderer, though it was never a secret that he was unable to show compassion. When he got in some serious financial trouble though, he saw no other way out. It was either him, getting killed by the men who he owed the money to, or the people at the bank he was going to rob. The robbery was carefully planned and to avoid being recognized he killed every single person who had seen him and destroyed the security tapes. He would've gotten away with it if it hadn't been for the DNA he left at the scene. Several years later he was found when he had to give off some DNA for an investigation he really had nothing to do with. In his subsequent escape attempt he seriously injured several cops and bystanders resulting in one fatality. He was sentenced to life in jail after a long procedure when he showed no genuine remorse for his actions. A lot of people agreed that this was still too mild of a punishment.