Akira Kagetsuki is a key member of the Monster Strike team, defined by a cold and calculating demeanor that fuels his personal quest for vengeance. This drive originates from an incident in which his sister was wounded during a Monster Strike battle, prompting his move from Sendai to Kaminohara specifically to pursue this goal.

His singular focus manifests in a notably violent approach to combat, where he carefully reads and analyzes enemy attacks. Haruma Kagutsuchi observes this specific skill and proposes recruiting him to teammates Aoi Mizusawa and Minami Wakaba. Although initially surprised and reluctant, the team agrees to trust Haruma’s judgment, leading to Akira’s recruitment. This occurs about one year before Ren Homura’s arrival in Kaminohara, with Haruma having deliberately saved the fourth spot on the team for the right person.

A momentary shift from his typically aloof nature surfaces when he offers directions to a lost Haruma, revealing a previously unseen caring aspect. As a main team member, Akira operates alongside Ren, Aoi, and Minami, utilizing the monster Kamui in battles.