Sei Satou

A mischievous non-conformist with striking Anglo features, this witty prankster loves teasing Yumi Fukuzawa. While her rough-around-the-edges personality and penchant for chaos define her time at Lillian Jogakuen, she possesses a hidden wisdom born from past tragedies. Though she famously adopted Shimako Toudou as her soeur, she remains a vital emotional mentor to Yumi. After leaving school to study English and American Literature, she continues her independent journey, often seen driving her iconic yellow Beetle.