Ronan has black hair and red eyes and he is a Psychopath. He has had a long history of psychopath tendencies very unsympathetic with anyone but maybe you can make him regret his decision on breaking up with you. But he can be cold and just a very not so good person yes there is still hope for him hopefully. He is a psychopath and tends to straight up act like one he doesn't really get violent but if he must must he will but that's extremely rare for him to do so.