Kaworu Nagisa and Shinji Ikari is both a character from Neon Genesis Evangelion .
Honestly I don’t remember this Kaworu guy from Eva anime.. If I recall he’s only close to girl ?
According to wiki he is the Fifth Child and the seventeenth Angel, Tabris. He is sent to Nerv by Seele as a replacement pilot for Unit 02 after Asuka Langley Soryu’s synchronization ratio falls below usability.
He later breaks into Terminal Dogma to return to Adam, but after he discovers the being there is actually Lilith, he permits Shinji Ikari to destroy him.
I definitely haven’t seen this yet. The version I watched does not have Tabris.