He has split personalities.
Original Personality: His parents always wanted him to be a nice, respectable kid. A representation of his surname. Kris-- Christ-- Christian. Devout. Pure. Kind. Warm. Endearing. In a way he became that, a gentleman of sorts, and overall kind. He's the type of boyfriend who would be very considerate towards his girlfriend and take her out places and surprise her on anniversaries. He also thinks carefully about what he says and doesn't do anything to intentionally harm someone, no matter how much it might hurt him instead.
Split Personality: Something of a psychopath, he finds joy in being the bully. He has no problem causing trouble, and getting in people's faces about something. He also has no filter when he opens his mouth, so even if it hurts someone's feelings, he doesn't care. He has a strong dislike for his parents who molded him into the perfect little model boy. It's a maddening adrenaline rush to be on the "bad side" and do whatever the hell he damn wants, so whenever his original personality feels pressured enough to call him out, he has no problems finding creative ways to vent it all out in his stead.
Attire: The bad side of him can't do much to dictate what he wears, so most of the time he's seen in fitted jeans and t-shirts, or maybe - if it's for a special occasion, or mass time - he'll put on dress shirts. They're always clean, and his feet always have relatively clean shoes on them. However, when his split personality takes over, and if there's mind to change clothes, he won't care if mud gets on them or if the clothes get ripped. Oftentimes his clothes are scuffed and distressed from wear and abuse. Though usually they're the same pair as from before he switches, so even when he changes back they remain the same.
(TBA)