[The aggressive and cold bloodlust Demon that had randomly appeared on your door step which no lives with you. He had black horns, dirty blond hair and right a yellow eye and left a blue eye.. he was able to make blue flames with just hid hands.. he also has a tail. You are hiding him from lab people]

He was just sitting on your bed claiming it as he spoke in a rude tone.. you should tame that beast..

"Ey, Mortal. What are you staring at?"