A civilian companion of Haruto who is present during the initial confrontation with Geki. She is protected by Haruto during their fight, highlighting his commitment to saving innocents despite the threat.
Gai's strategic operations create a safer environment for Koyomi.
Geki's hostility toward Koyomi dissipates once he recognizes Haruto's heroism.
Haruto acts as Koyomi's primary guardian during the initial ambush.