Did Yuri know???
Yuri says something strange.
In Act 2 when Monika has set her to 'self destruct' before her seppuku, she says
Yuri: "I don't care if Monika is listening."
She also mentions how Monika is always listening after the 2nd time you catch her cutting in the hallway.
Monika is not around either time.
Coupled with Monika "I'm always listening"
This implies that at some point Yuri became aware that Monika was an omni-present force...
Was Yuri also becoming aware of things beyond the boundaries of her script?
Maybe not AI / self aware. Or maybe she was to some extent, but because of what Monika had done to her she could not get past the reprogramming to do anything about it?? If being club president give full awareness, maybe being vice-president grant some degree of awareness as well. Maybe it's not a coincidence that the two characters who killed themselves were vice-president.