Souta Mizusaka

Souta is a middle schooler living in Kirumiko Town who serves as the rational anchor of his friend group. Though he comes across as detached and blunt—and seemingly distant from his twin sister Yuzuki—his actions reveal a deeply caring nature beneath the surface. He regularly lends a hand at Koharu's shop and quietly watches over everyone around him. Having sustained injuries while searching for Yuzuki in the past, he maintains a grounded, skeptical view toward the mysterious disc phenomenon, making him the team's voice of reason.