an offspring of a nephilim would be more normal human than half giant with wings. people describe nephilim more as physical begins.
he / it. is like Rei. it's a clone with a humanoid body. just personal opinion on my part. i feel Rei and Kaworu wouldn't have or need- functional anatomy bits, in a human way.
the other angels (besides Adam) had unique bodies not humanoid. would you say Rei and Kaworu were lucky or unlucky?