How does Beatrice remember about Subaru?

Question

In episode 5 of the anime Subaru experiences the first Return by Death at Roswaal's mansion: after he runs away from his bedroom, he meets Beatrice, who remembers him even if that should be the first time they meet in that "loop". How can she remember him?

Answer 1

Because the "save point" for that part of the story is not the point when Subaru wakes up for the first time, but when he wakes up for the third time. That's also when he first meets Ram and Rem. (His first waking is before the opening in episode 4, while his third is right after the opening.*)

*At the start of episode four

Subaru wakes up, notes that it's an unfamiliar ceiling, walks around a bit, finds the library, talks with Beatrice then falls unconcious because Beatrice suck some of his mana.

Answer 2

Subaru's first save point at the mansion takes place after Beatrice drains his mana, rendering dearest Barusu unconscious. The save point is the second time he wakes up in the mansion.

Answer 3

Subaru has already met beatrice before the checkpoint (the first time he woke up he didnt wake up to rem or ram or anything) but what I'm confused about is how beatrice seemed to not react when subaru asked her if she killed him or something in episode 6