Eri Shinkai

As the dedicated class president of Class 1-A and the founder of the school’s Treasure Hunting Club, this wealthy student possesses an unshakeable passion for solving enigmas. Driven by her obsession with mysteries, she strategically recruits Aika to utilize her Class C license for investigating the strange disappearance of Karen. Combining her leadership skills with a sharp, inquisitive mind, she serves as a pivotal figure in uncovering the truth behind the school's unfolding secrets.