So what's the party line on the whole headmates thing?
Stumbled on someone decrying TikTok "multiplicity kids" on twitter, but not sure how I feel about this thing and there's no wikipedia article which is usually the limit of my research.
On one hand DID and OSDD are real things, though some people say it's a culture specific disorder.
On the other kids having calling themselves "we", claiming to be piloted by Harry Potter characters, real-life serial killer and Minecraft YouTubers seems to silly to not be just good clean fun.
On the third hand is you told someone thirty years ago about gender spectrum, genderfluidity, xenogenders, bi lesbians, autism spectrum, they'll probably think you're insane. Maybe there is a subclinical version of DID, like Asperger's to autism, so to speak? I dunno...
Rainbowgenic:
Rainbowgenic is a term to describe when the core's parents had a previous miscarriage, stillbirth, or death during infancy, and the spirit and/or soul of the previous lost child/children stuck onto the next child. The body is shared between the previous sibling/siblings and the current sibling. This may be protogenic, spirigenic, and/or metagenic
The problem here is that it's a fairly diverse community, with some people pushing incredibly out there stuff and more "conservative" elements that try to invalidate the former and out fakers. There is probably a conservative version of the headmate thing many people here would find plausible.
I'm saying that kids who think they're sharing their body with the soul of their aborted siblings are a laughing stock even among the people who have Minecraft YouTubers living in their heads.