Mana Kirishima (霧島 マナ, Kirishima Mana?) is the main focus of Girlfriend of Steel (鋼鉄のガールフレンド, Kōtetsu no Gārufurendo?), a game that is like an episode of the series. She appears as a transfer student at the Children's school, and becomes the focus of Shinji's interest and Asuka's jealous ire. She is the pilot of another man-made replacement for the Evas, the Trident, whose combat skills are somewhat more on par with the Evangelions', to whom they bear a resemblance in design compared to the Jet Alone robot. She also appears in Shinji Ikari Raising Project. Like many Evangelion characters, Mana's family name, Kirishima, is taken from a World War II battleship.
A shy female character, Mana Kirishima, starts at Shinji Ikari's school and immediately admits to finding him cute. Gradually, a relationship unfolds and they end up going on a date where they kiss. It turns out, however, that she is one of three test pilots of TRIDENT, a new competitor to the Evangelions, similar to Jet Alone (thus the name "Girlfriend of Steel"). Eventually, the other robot goes berserk and the Evas have to destroy it. Throughout the game, Asuka is constantly jealous of Shinji and Mana's relationship, consistent with her widely-speculated romantic feelings for Shinji. Rei is present but plays a rather background role in the story.