Nexxiss

One of Darkness' (Guild of Saoraid) more dangerous and mysterious members is Nexxiss. Nothing is known about him before capture as attempts to communicate were disappointing, at best. The only person that has a limited control over him is Corvinus, the guild leader. It was Corvinus who captured Nexxiss and put him in the isolation chamber in Darkness' guild castle. Nexxiss has to be supervised and sedated at all time, lest his perpetual anger results in him biting through his cage bars, escaping and brutally mauling several people to death... again. Rumour has it that he actually got mad one day and ate his family, and their friends, and friends' pets, and pets' food, and since he wasn't satisfied yet, he also ate the local church (the building..), and everyone inside.
Noone really knows how Nexxiss looks. He has resisted every attempt to remove his mask, and by resisted I mean bit off the hand of the unfortunate person who tried. Some specualate that he doesn't have a face, per se, and that he's actually a cloud of evil and madness entombed in a suit of armor, and we all hope he never gets out.
Nexxiss' relationship with Darkness is semi-symbiotic. The guild carries the heavy burden of keeping him away from the general population (usually by holding strange rituals and sacrificing hamsters to the evil god Keldhor) and in return, they are able to unleash him and make him attack a target of choice, usually a raid boss (whom he can easily solo, just need to stop him before he consumes the loot) or some political enemy or random people, for fun.
Something that very few people know, is that Nexxiss actually has a soft, artistic side. We bough him a few fluffy, white bunnies and some furry balls. He amazed most of us when he started playing with them, and soon became obsessively protective of his bunnies. We deciced to follow-up on this revelation and bought him a "My Little Painting" kit. It had only half a brush and 3 colours, but he happily painted. We have no idea what it is he painted, but that might be because he immediately ate the blue and green paint, so basically the whole painting was red, but he was so happy with the result, we didnt have the heart to ask what the hell it was.