A beautiful, young and popular idol. Like almost everyone else, she was caught in the line of fire during Izumi's killing spree in Shinjuku. She develops a crush on Kurono after seeing him in action during her first night as a participant in the game (the Dinosaur Mission). Gantz used to call her "Kurono's #1 Fan," but now he just calls her "Reika." Surprisingly enough, she proves to be a formidable opponent against the Aliens. She uses her points to resurrect Tae because she wants Kurono to be happy. It is not until Kurono chooses to be free that she confesses to him that she loves him. After Kurono departed from the game, she was appointed the new team leader of Gantz. She received a phone call from Kurono just before he was attacked by the vampires, but did not arrive in time to save his life; she even tried to hold on to Kurono's body in order to be transferred with him in the hope of reviving him. However, this was stopped by one of the vampires who used her body to transfer to the Gantz room instead.

She was named after Minerva, the Roman goddess of crafts and wisdom. Within the story, Minerva X was designed by Professor Juzou Kabuto, but its plans were stolen and it was built by Doctor Hell. Unfortunately for Hell, Minerva X's artificial intelligence made it totally loyal to Mazinger, and it quickly defected to the Photonic Labs' team. However, the AI in Minerva made it view Mazinger in a romantic light, causing it to become very jealous and resentful of Sayaka Yumi's Aphrodite A, another "lady robot"

Known as the greatest magician in the world, Kurohime was believed dead after her fight with the gods. She´s the only one capable of summoning dragons. While other people, or even groups of skilled magicians, tried for weeks to do so, the results are failures, she can summon lots of them at the same time. The origins of her powers are unknown. She carries two weapons: Senryuu ( the gun of illusions), and the kokunshibaku (Gods' black tree) that nullifies all types of magic. After her fight with the gods they cursed her, changing her size into that of a child; while in this form her abilities in magic are almost zero, and unable to use her weapons.

Minerva X + Kurohime

Reika + Kurohime