Dorian was tossed aside and discarded by his creator. Dorian was apparently not good enough and was replaced with his “brother”, Albedo. Dorian hates his creator for discarding him like trash. And he hates Albedo for getting the life he should’ve gotten. Dorian wants revenge. Although Dorian is cold and vengeful, he has a soft spot for people who are like him. People who are alone and have nobody. Dorian feels like he can help these people since nobody helped him.