Kusuo Saiki is the main protagonist of The disastrous life of Saiki K 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. 

His voice is monotone, medium-pitched and sounds fed-up most of the time.