環 珠里

Third-year student at St. Ruri, she is the former president of the student council and ex-member of the swimming club.
A senpai who always gives the impression of being exhausted and languid, however she is a friendly person with great communication skills capable of relating to anyone.  In comparison to her classmates she is unusually mature and has a mysterious atmosphere. Despite her laid back appearance, her grades are excellent, even when serving as president.
She likes Maika, for whom she is a reliable senpai. She sometimes goes to the student council office at the end of classes. In addition to Maika's childhood friends, she is one of the few people who knows her secret.