Mikan is the main protagonist of Braingirl.
Unlike other Yume Nikki protagonists, she seems to actively be conscious of her outfit when utilizing effects.
While in the real world, Mikan wears a large green shirt. While in the dream world, Mikan's default outfit includes a white windbreaker jacket, black stockings, and red ankle-boots, as described by her inventory. She also appears to be wearing a backpack.