Her excessive self-confidence leads her to clash with Shinji, gradually losing self-confidence and becoming psychologically and physically compromised.
Shinji with Asuka on top of him in End of Evangelion Asuka loudly proclaims she can't stand the sight of him, but Shinji replies that it is because he is just like her, as she is implied to be in some sort of sexual fantasy or activity inside Instrumentality with him.
Exploring the Limits of the Human Through Science Fiction.
Like the thing with removing the Evangelions.
Neon Genesis Evangelion: The Unofficial Guide.
She is the only one of the three to have had parents or go to school prior to her current one.