Is Asuka a clone like REI?

She is an artificially created child, like Rei and Kaworu. She is the only one of the three to have had parents or go to school prior to her current one. It is later revealed that on one of her first assignments, Asuka was forced to kill her mother after Angels took possession of her body.

Did Asuka know she was a clone?

This is why she always showed off her skills and tried so hard to be the best pilot, because she knew as a clone she could always get replaced and needed the recognition to justify her existence.

Is Asuka a clone of Mari?

One other theory here is that the Mari we first see in Evangelion 2.0 is a clone of this Mari. Since in 3.0+1.0 we find out Asuka is a clone too like Rei and that could be the real “curse” of aging.

Who was Rei in love with?

In Episode 23, Rei sacrifices herself to save Shinji, realizing she has feelings for him.