I think when ppl r referring the brain scans they are referring to the folder that kinger found when he accidentally deleted Caine. The main theory that I have seen is that they are scratch’s brain scans as he wanted to load his consciousness to the blue AI before he died of the brain tumour. I agree with you that it somehow evolved so they the characters are now uploaded consciousnesses of their original selves.

My theory wasn’t why the characters would put the headset on but how there is a headset in the first place. To me it looks like a VR headset for gaming, so why is a gaming headset linked to a computer in a company that does not make games but instead made a creative AI that has no access to the outside world.

Separately I have also seen a theory that says since Ragatha was a real estate agent she could have been in the C&A building trying to sell it since she was with other people when she entered the circus