>>2185992Rei wasn't born until some time after 2004.
Physically, her body can be identical to the expected body of a 14-year old.
But mentally, no. Rei is very intelligent, she's smart, athletic and all that, but she lacks the development any child would have at her supposed age of 14.
We just don't know how old she is. Anno/Gainax/Khara never gave enough of a fuck to do something about that.