A high school senior, Iroe is the head of the Model Club. Despite her short stature, her underclassmen (and some adults) call her "Neesan." In contrast to this, her classmates call her Chibiko. She is generally vulgar, outrageous and is a big troublemaker. She likes being the center of attention and making fun of her fellow club members.
Surprisingly, Iroe is good at academics, cooking, and shogi. A model of a castle stands on her head.