Shisui Tsuchimikado

As the firstborn of the Tsuchimikado family, Shisui willingly stepped into the GRANBELM battlefield to shield her beloved younger sister Kuon. When faced with the threat posed by Suishou Hakuta, she made the grave choice to surrender her own soul as a means of intervention—a sacrifice that plunged her into a prolonged coma. That very act of devotion became the driving force behind Kuon's resolve to fight. Upon awakening, Shisui revealed a tranquil yet warmhearted presence, guiding the protagonists through music and measured wisdom before ultimately embracing a return to an ordinary life.