Kei Kishimoto is a member of the first Gantz team shown in the manga and the Anime, and remains a main character in the series until she dies in the third mission
While the Kishimoto from the Tokyo Gantz team is still dead, her other self has been found by Kato, passing in a subway, he passively flirted with her. A version of Kei Kishimoto appears in the novel Gantz/EXA the protagonist of the novel, Nagatomo, who is an astronaut, wakes up inside his ship to find a huge amount of black spheres floating in space, he realizes that there is life activity inside them and brings one back to the ship only to discover a girl, Kei Kishimoto, within the sphere, Suddenly, Kishimoto is transferred along Nagatomo to a GANTZ room that looks like it's the Tokyo one, the black sphere inside the room starts playing the radio song and reveals the target, the "comedian alien", then sends both to the battle area. Kishimoto is wearing her GANTZ suit now but Nagatomo is only wearing his space suit, they fight the aliens (Kishimoto proves to be useful, because she knew about the missions) and are sent back to the room.
The "Astronaut" gets 6 points and "Big tits" gets 0, Kishimoto decides to stay in the GANTZ room
Part 1 of the live action adaptation of Hiroya Oku's Sci-Fi/Thriller Gantz.