Youko Mizuno

A sharp-witted yet mischievous student at Lillian, this former outsider first gained prominence by delivering the freshman welcome speech. Known for her calm demeanor and a deep-seated desire to meddle for the good of others, she formed a protective, older-sister bond with Sachiko Ogasawara. Beyond her devotion to Sachiko, her profound connection to Satou Sei remains a central focus, fueling popular fan theories regarding their relationship. After graduating, she pursued a law degree to fulfill her lifelong mission of helping people.