Chisato Sumiyoshi

Chisato Sumiyoshi (住吉 千里 Sumiyoshi Chisato) is a sophomore at the Academy, the president of the Research Club at Takafuji Private Academy and the childhood friend and neighbour of Yūki Ōjima who does not like chocolates due to the death of Daiki Sumiyoshi (Chisato's deceased younger brother).