Bdoom told me in PM Faust is materialized now.
When Faust materialises, Rider will also do so pretty much instantaneously. Her goal is to stop him getting to Sakura, after all, and she can't do that if he's materialised and she isn't.
I know Sakura is, but Mordred "roots" for Sakura's escape and prepares in advance.
That's not what your post sounded like, though. And, Sakura is not going to get away from Rider. Rider is faster than Faust, and will not let him "kidnap" Sakura.