Yuki is a very hot-tempered person, many things can set him off including the school delinquents specifically Shinonome and Towa. He used to be troublemaker just like Shinonome when they were younger now, Yuki tries to erase that stain by staying involve with Student Council. He loves staying over for S.C. affairs, and rules the school alongside Mikado even overshadowing him sometimes.
He's also one of the smartest and hottest guys in school and has been even stalked, abducted, and almost assaulted when he was younger. Although he's strong enough to pull himself through all that, he can't seem to thwart Shinonome's plans.