Mitsuru Kirijo is the sole child of Takeharu Kirijo, head of the Kirijo Group, and she holds several positions at her school: top-ranking valedictorian and student council president. In combat, she wields one-handed swords such as rapiers and sabers. Her Personas specialize in ice spells, making her a formidable offensive magic caster, second only to the main character. Mitsuru has been fighting Shadows for an extended period of time. Upon discovering the potential of the main character as a Persona-user, she, along with Ikutsuki, invites him into SEES. At first, she serves as a support character, offering analysis and advice. However, after Fuuka Yamagishi's discovery, whose analytical abilities are stronger than Mitsuru's, she joins the party in battle.
Throughout the game, Mitsuru hides many details about Tartarus and the Dark Hour from the group, due to feelings of guilt over her familys involvement