the fate of Mona is not clear to me, the scene with Burke does not seem very clear to me, he deletes her name from a file / program, and then we see her leave as Maya's father enters the dormitory (not sure it's her, but I think so)
it makes me think that she is leaving by her own, perhaps pushed by Quinn, the fact that Burke deletes the file is only a consequence.
I also have another doubt about Mona, we have often talked about the relationship with Camilla, but it seems to me the situation has changed a lot. at the end of the fifth chapter Quinn asks Camilla if Mona can be trusted, and Camilla does not answer, but from how the sixth chapter begins I would say that either Camilla does not trust Mona or in any case she has not convinced Quinn at all, then it is only Lily to defend her. and finally, after they have all been named "sisters" Camilal doesn't think for a moment about going into the room with Riona leaving Mona again, who is obviously not happy