In the end, as Jack said, no fault could be found with the appearance of the girl.

Reika, walking ahead by herself, would sometimes turn around to look, but she could not locate Jack.

And yet when she called out "Jack", she was answered by "What is it?"

It was mysterious, but with so many incomprehensible things happening recently, she could not be bothered to point this out, and walked back to her own apartment at leisure.

- Fate/Apocrypha: Unbirth