Izumi Tatsumi (立見 いずみ, Tatsumi Izumi) is a one of the hunters chosen by Gantz. She participates in the Dinosaur Alien Mission.
She is slightly more intelligent then her friend Rika Shiraishi by running back when peoples heads started inflating and bursting.
She is slightly overweight and often wears high fasion outfits much like her friend.
After her friend's head explodes for trying to leave the hunting zone, she spots the Kappe alien and foolishly attacks it, thinking that it was responsible for killing Rika It hits her back but she manages to pin it to the ground. However, the Kappe summons four raptors which surrounds her and rips her to pieces, killing her.