Shouko Seto

Shouko is both Ruri's classmate and the class representative. She harbors a dream of becoming a mineralogist, yet had long kept that passion hidden due to her parents' lack of understanding. Naturally introverted and not comfortable in social settings, she begins to open up after meeting Ruri, who shares the same enthusiasm for minerals. Together with their companions, she takes on new challenges and experiences personal growth through the journey of collecting rocks and minerals.