Many otherkin and fictionkin experience their kintypes as previous lives, and generally also consider those previous lives to still be fully them without separation. Sort of how you’ve grown more than your 10 year old self, but your 10 year old self is still fully you, rather than a seperate person. That’s how past life kintypes are.

There are also otherkin and fictionkin who experience their kintypes in ways that aren’t past lives such as parallel lives, and embodiment.

And there are kin who have past lives that they don’t consider ‘relevant’ enough to them to personally consider a kintype.

What you’re describing sounds like something I might easily describe as a past life memory we’re it to happen to me. These can also be called noemata, of you prefer a more psychological term.

It also sounds to me like you could be experiencing something called ‘fictionflickers.

Fictionflickers are a type of experience where a person suddenly and temporarily experiences being a person from a fictional media, which may include receiving flashes of memory, or temporarily takingbon the personality of that character.