Gogo
First appearance in manga: Chapter 228
A vampire under Hikawa's command, she's best known for her striking resemblance to Gogo Yubari from Kill Bill—a comparison that's become her nickname. She presents herself as a composed young woman in a suit with long dark hair, and rarely lets her emotions show, which makes her deadpan demeanor almost unsettling.
She's introduced as just another clubgoer heading out with friends, though the venue itself turns out to be the vampires' headquarters. When Akira Kurono attempts to intervene, Hikawa overpowers him and claims her. Later she confronts Kei Kurono directly as a vampire combatant. During the ensuing fight, a mission transfer gets triggered—and following Hikawa's lead, she grabs Reika as a hostage to secure her own passage into the Gantz room.
In combat, she's deadly efficient with a katana. Her emotional restraint is such that her partner is genuinely startled when she actually laughs at something—specifically at a joke Gantz makes. Once they're released from the room, she asks Hikawa whether they should eliminate the Gantz players. When he refuses, she simply follows him back out.
Content compiled by AnimeList.moe from publicly available sources.