Mitsuru is mature, calm, and very intelligent, being the top in her class and is multilingual.
As the president of the student council, Mitsuru is very caring for Gekkoukan's students, but especially towards her fellow S.E.E.S. members and is good friends with Akihiko.
She states that she began using her Persona to protect her father, and becomes utterly depressed when he is killed by Ikutsuki.
It is not until after Yukari confronts her in Kyoto that she regains her will to fight and becomes close with Yukari.
Mitsuru claims to have absolutely no fashion sense; she relies on her family's stylist instead.