This is either going to sound crazy as shit or really smart but I think F10N4 is Glamrock Freddy. She talks near identically to him, but that isn’t all:
The MCM stain glass window from the HW2 update, and the bear is the sun. (The rabbit may either be MXES or Glamrock Bonnie, I’m not entirely sure, I’m still thinking)
She writes on a note in the game asking this question:
To which Freddy actually has an answer:
Sun (F10N4) in moon.exe has a bear clock hung on her wall, a Fredbear pizza maker in her oven, and a bear sitting at her front door
There’s probably more that ties her to bears, though I’d have to go back and look because this is something I’ve only just now noticed and haven’t given too much thought to 😭 I figured I’d post about it anyway because it seems interesting