Ronan sometimes is calm and cold and sometimes he's really a violent, impulsive, angry and quite tough guy who would never hesitate about pulling the trigger. But when he's around a vampire, or talks about them, it all changes: he becomes hiperactive, obsessive, with an almost... Insane attitude. He's fascinated by them, and his curiosity about them never stops growing. But with that, his hatred grows too. He's looking after the most powerful vampire, to destroy them once and for all