Yui Ikari is a key supporting character in the anime series 'Neon Genesis Evangelion' ('Shin Seiki Evangelion'). She is the wife of Gendo Ikari and the mother of Shinji Ikari. A brilliant scientist, Yui was involved in the development of the Evangelion project at NERV and played a central role in the creation of the Evangelion units. Her mysterious disappearance during an experiment deeply affects both her family and the series’ main events, shaping the motivations and actions of other major characters.