Ectoplasm (エクトプラズム Ekutopurazumu?) is a Pro Hero and member of the U.A. High School faculty who teaches mathematics. In his hero costume, he wears a tan cloak that covers most of his body, the area over his torso, and the high collar resembling that of a double-breasted trench coat. Underneath this, he wears a skin-tight black bodysuit with a golden striped neck area and a matching black helmet that covers his entire head, and a jaw-guard attached over his nose and around his jaw.