Mai Zenin is a supporting character in the anime and manga series Jujutsu Kaisen. She is a second-year student at Kyoto Jujutsu High and a member of the influential Zenin family. Mai is the younger twin sister of Maki Zenin, with whom she has a complicated and strained relationship due to family expectations and personal insecurities. Despite her blunt and sometimes abrasive personality, Mai is a skilled jujutsu sorcerer who wields a revolver and uses Cursed Energy to create bullets. Her role in the series involves participating in the Kyoto Goodwill Event and exploring the dynamics of family, rivalry, and self-worth.