Adrian

Adrian used to be a human, living his ordinary life like everyone else, until one night he got cornered by a suspicious man and killed. Apparently, said man was a vampire and sucked his blood out with no mercy, leaving him immediately for sure death. (Un)Fortunately, instead of dying for good, Adrian got turned into a vampire. Refusing his new nature at first, he eventually got used to it. 

He's basically a ball of anger and frustration, with 2 and a half cups of pride and a pinch of loneliness. It's not difficult to make him snap and he becomes surprisingly violent when he does. He doesn't trust anyone, not even himself. Adrian always pretends he's a pureblood vampire, as he doesn't want others to look down on him for being 'ex-human'.

Having a short temper and being full of frustration, it's pretty fun to tease him, at least to Dimitriy, who treats Adrian as a very unusual snack.