Whether or not you can handle it isn't what I worry about.

[It's what he'll do that scares her. It didn't matter so much if he could bear what he learned, it's that seeking that knowledge, seeking that truth, has always gotten him killed.

With her death, there had been a sense of relief that she was dying as 2B. There would never be a 2E again, all of those memories would end and she would cease with nothing but the sight of 9S in her gaze as her world went black. There had been a sense of sadness that they would never go on that date, that he would never teach her about t-shirts or silly things humans would do, how they lived.

Now they have a chance to experience it all side by side with humans and she's alienated him by taking her willingness and her eagerness to love them so far. She's changed her body, her goals. She should have guessed it wouldn't be something he took well. Slowly, she guides him into the elevator, still keeping him facing away from her.]

I just want you to be safe. If something happens to you and you lose what makes you the 9S you are now...

[She can't do that again.]

That's why I put distance between us.