>Mindless doll built for sex
She is perfect already, no need fixing
Rei slowly gets better on her own, if kept from dying. Just as asuka slowly gets worse.
Rei is held together with pills and duct tape. She's not really human, she won't get 'better'
Care about her. It's literally that simple.
She wants to have a purpose and to be useful. Hell, giving her the dick won't do anything because she doesn't care what happens to her, though if you're into kinky slave stuff, it's great. But really, who would want to fix her?
Something we can all agree with