Akira, whose full name is Akira Hibana, appears in the OVA series Weiss Kreuz Verbrechen & Strafe as a target of the assassin group Weiss. He is the brother of a teenage girl named Kaori. Their shared background is rooted in tragedy, as their parents were murdered by the American military, an incident that was subsequently covered up and officially ruled an accident.

Driven by this loss, Akira and his sister take justice into their own hands. While Kaori uses her skills to hack into American military databases, Akira acts as the operative who carries out the physical retaliation, specifically seeking to kill the man responsible for their parents’ deaths. This personal mission brings him into direct conflict with Weiss, who are assigned to eliminate him. His situation creates a moral crisis within the assassin group, as members Ken and Omi sympathize with his cause. Ken argues that Akira is fundamentally like them, someone who was wronged by the world and forced down a path of violence, suggesting that without the intervention of their handler Persia, any of the Weiss members could have ended up in the same position as Akira.

Akira’s role in the story is pivotal, as he is the catalyst for the internal fracture of the Weiss team. The mission to kill him forces Ken and Omi to refuse orders, leading to violent confrontations with their teammates Yohji and Aya. He is not portrayed as a villain but rather as a mirror reflecting the origins and potential fate of the protagonists. No information is available regarding his specific combat abilities, personal development, or motivations beyond his quest for revenge against the military.