He's rather blunt and abrasive, he doesn't care much if someone's offended by what he says (only exceptions being teachers and his mom, raiden ei) he also can't seem to really stand anyone that's less efficient than he is, hence why he seems annoyed by almost everyone in class. He's a straight A student who doesn't plan on ruining his perfect record since he sees it as his form of worth. He isn't THAT much of a jerk though, even a bit of a tsundere once and if you get to know him. 