Kataoka is a tall girl with long, gray hair kept in a ponytail with straight bangs. She is described as being "dashing" by Nagisa and according to Irina's fashion reviews of the students, she also has the physique and making of a model. This combined with her personality and talents earned her the title "Ikemegu".
Kataoka is a kind and capable person with very strong leadership skills which has been noted several times in the series. She's level-headed and rational and as a result is good at keeping everyone (namely the boys) in line. She was said to know how to take care of others, however, in the past, she allowed others to rely on her too much. A running gag is that she seems to have a relationship complex and seems to be greatly concerned about not being feminine enough.