Circlet Princess: Ayumu Aizawa

A computer expert who helps Yūka and Miyuki re-open the Union school's CB club as the manager. She often wears an oversize White coat that used to belong to her father, who is one of the developers of the Circlet Bout and the technology around it. Initially, she has no interest in the Circlet Bout until her father's disappearance, where she got involve in order to track down her father's presence. In the Circlet Bout, she is basically tasked to analyze the opponent's capability and coming up with strategies that give her team the advantage. She doesn't actually compete in any bouts, but if she does, she is armed with a riot shield, but unlike the rest of her team who can take both offensive and defensive position, she is more on the defensive position where she relies on the arsenal of weapons that she installed in her shield that doesn't do her any good since she lacks any training to dodge any coming attacks.