Nagisa Shiota.

A normal boy it'd seem, that is until you look past the innocent appearance and convincing smiles.

Look past that and you'd find a natural born killer and a broken child crying out for help.

Karma Akabane

Violence seemingly in his blood, you'd see a strong boy on the outside. Look past his lazy smirks and sadism and you'd find a boy who's trying to keep himself together even after years of constant guilt and regret.