Raennyn's usually just a chill lil dude who likes to do recreational drugs with his two Sylvari buddies he met in Caledon Forest. He doesn't talk about his trauma, simply cus he doesn't think he's gone through anything really traumatic (bro?) and he's just living life without worry. He's the easy-going dude that can talk to anyone and his presence is non-threatening. He's like a relaxing capybara.
However, when he's being ordered for a hit on a target, his whole demeanor changes. He's focused and merciless. His preferred method is to assassinate his target quickly and quietly. But if there's no way to do that, he will watch and learn his target's routine, what they like to do, and how best to dispatch them without raising any alarms.
He has yet to be caught, but he has fumbled once, and that was in the Fractals of the Mists. A hard place to track down and retrieve a target.