New WN chapter is out. here's the summery:
it starts with discussing the book. Lots of back and forth about who should read it, with Subaru knowing he can't let anyone else, but everyone eventually comes to the conclusion that it should be him.
Meili was a feral child raised by beasts, she didn't know how to walk or talk or anything really. Elsa came one day and took her to "Mother", who speaks exactly like Capella, and she was apparently eviler than evil. Wanting Meili to live only to love her "Mother". Elsa also worked for Mother but wasn't too loyal, and Meili ended up imitating her instead. Seeming to model all of her human behavior off of Elsa. Though she was still taught manners, and how to walk and talk, by Mother. Meili literally doesn't know how to process Elsa's death, doesn't even know how to mourn or understand the value of life, so she went to the library to find Elsa's book.
Subaru met her there, and Meili freaked out a bit because she thought she'd been found out. Subaru was looking for a specific book and was too impatient to wait for anyone else, and then he leaves. Throughout the memories, Meili's own name is blacked out. Like she doesn't recognize that name as being "her". She just thinks of herself as the "female", considering herself an animal in human shape.
Subaru soon comes back, but he's acting a bit weird. Basically tells her to stop bullshitting him, EDIT
r rather he tells her not to disgustingly suck up to him and calls her a submissive doll, and to start listening to her desires or something. She starts considering what she wants to do, and then it cuts out to the murder scene.
Meili said something she wasn't supposed to, and that was a rule violation. "Natsuki Subaru" rambles about how this round was lost due to that, but he's hoping next time's performance will be more daring. The Natsuki Subaru murder mystery.
EDIT: Should also note, the murder scene looks a little like an interjection between Meili thinking about what she really wants, and her final thought. "I'll kill you". Meili never comes across as genuinely fond of Subaru. If anything, she's scared of him. She's not exactly happy with how Elsa was burned alive either. She doesn't really know how to express grief and hatred, but that seems to be what's going through her mind after Elsa is killed and she's thrown in prison. The secret message, that it's a rule violation for Meili to tell directly, was just him telling her to listen to her heart. More or less. So Meili's probably the stair-pusher, killing him when she realizes she wants revenge. But not the one who lopped his head off in Tower of the Dead.
Source:
https://www.reddit.com/r/Re_Zero/co...r_45_meili_portroute/?st=jl5pzl47&sh=5f1d545f