Noda

Noda is the SSS's halberd-wielding enforcer, who follows orders from no one but Yuri Nakamura and won't hesitate to threaten or hurt anyone who challenges her authority.

He's discovered by Yuri Nakamura, Hideki Hinata, Ooyama, and Chaa during a descent into the underground tunnels, convinced he's the protagonist of a video game sent to defeat its final boss. Learning otherwise sends him fleeing in tears, but after several failed escape attempts he eventually joins the group. Little is known about his life before death, though drama-CD hints suggest he lived as a recluse who felt he was a burden to his mother.