Yui Ikari

As the beloved wife of Gendou Ikari and the mother of Shinji Ikari, this pivotal figure serves as the emotional heart of the series' complex backstory. Though her presence is felt most through the lingering impact of her disappearance, her profound influence shapes the motivations of every major character. Her tragic fate and connection to the experimental projects remain central to the unfolding mystery of the Evangelion saga.