((I could do without the lines like a mouthpiece. Also, even if he's out of armor, he usually keeps at least a piece of it on his person, which is most likely than not a pauldron with a segmented arm protection.))
Sesvin is calm and collected, usually a man of few - and usually pleasant - words and an unbreakable will and resolve which may make him appear stubborn from time to time as he sets his mind on something. He has been training, his mind always focused on obtaining power; he himself doesn't know why he pursues power or when he started to do it, but he does know he has to have it. Maybe for the drive of the search in itself - a quest to discover what he really wants from the world, with the side benefit of having means to get it in the end.
The dragoon also helps the people within his reach; even if he doesn't happen to be a hero, he has no problem in assisting the people he comes across and striking down the wicked. He doesn't feel overjoyed by it, but it does give him a sense of warmth, and it is one of the few things he cherishes in his inconcise, uncertain life. Sesvin likes to help in chores and small household tasks of the common folk when he has already spent some of his time trained and decided for some time of rest. He is usually methodical and focused when performing a task.
The young man protects the weak, for he feels death may be a path to Oblivion and thus lives must be spared. The wicked also have the right to live, but depending on their crimes, their claim to life is weaker; and thus they have accepted the risks of treading the path.
He has occasional bouts of cheerfulness.
((I could add more, but I may decide to RP more of him later and I don't want to trap myself.))