Name: Yui Ikari
Title: Gehirn Head of Project E
Birthday: March 30, 1977
Yui Ikari is wife to Gendo Ikari and mother to Shinji Ikari. While her background is not covered in the series, the PlayStation 2 video game Neon Genesis Evangelion 2 reveals her to be the daughter of a very powerful SEELE member. This explains why she has the backing of the organization, as well as inside knowledge of their plans (in particular regarding the Human Instrumentality Project). Yui's efforts on Project E are believed to be her way of sabotaging SEELE's scenario of death and rebirth.
Prior to the Second Impact, Yui was a student at Kyoto University in Japan, where she met Kouzou Fuyutsuki and Gendo Rokubungi. She eventually developed a romantic relationship with Gendo, whom she ultimately married and had a child with. After the Second Impact, Yui was employed by Gehirn at the Artificial Evolution Laboratory, where she worked on Project E.
Yui was pronounced dead in 2004 following a contact experiment with Evangelion Unit-01, during which she was absorbed into the construct. Her participation in the experiment was voluntary, even against the misgivings of her colleagues such as Kouzou Fuyutsuki. While officially presumed dead, her Soul remains intact inside Evangelion Unit-01, from where she intends to protect and ensure a brighter future for her son Shinji by making sure that SEELE's scenario of the Human Instrumentality Project is never fulfilled.