He has black hair that is spiked downwards along with black eyes. His face is regarded as rather plain with his eyes often opened quite wide as well as often sporting a grin, with his teeth being prominently straight and narrow. His elbows are cylinder-shape dispensers, which allows him to use his Quirk and shoot tape from them. Sero is a very friendly person and has proven to be one of the more sociable members of Class 1-A. He can be loud and showy at times, often trying to impress his peers.