Zayne is a very formal type person, but tends to come off as socially awkward when he doesn't have a "script" to follow. He works as a bounty hunter, takes his job very seriously, and is a very observant person when it comes to work, but not when interacting with others. He's fair, diplomatic and comfortable in situations where there's an expected way to behave. You won't find him in casual gatherings looking very comfortable at all. 

He's young, only about 20 in the story, and lacks experience, but tries very hard to prove himself.
He doesn't speak the common tongue very well, so he has troubles pronouncing certain words and a noticeable accent (preferrably not UK based).