Saiki is the main protagonist of Saiki Kusuo no Ψ Nan who has all kinds of psychic related abilities. He usually tries to avoid getting involved in problematic or attention-grabbing situations, but his attempts always end up going wrong or having unusual ends to his displeasure. His trademark appearance contains his constant frown, his green-tinted glasses and two pink antennas located slightly above each ear, which have the function of limiting his power. Initially he was always seen alone, but in the course of the story he develops lasting friendships with his classmates and schoolmates.