Mifuyu Nagihara

Mifuyu is Haruhiko's childhood friend, and friend to Reina and Saki. In middle school, she harbored romantic feelings for Haruhiko but was turned down; despite the rejection, she is still interested in him even in university. Mifuyu feels compelled to help and protect "Aki" whenever she comes across "her", unaware that Aki and Haruhiko are the same person.