Makiya Kasumi

A third-year student and the older sister of Sumika. Kasumi is a kind and refined girl who is the student council vice president. She likes spending her time researching things by watching the TV and using her mobile phone, which shocks Shoutarou, because Kasumi comes sometimes off as a naive, sheltered girl. Makina is also the childhood friend of Shoutarou and has been interested in him for a long time.