It’s called dissociate identity disorder and as someone who has it, it would depend if your talking metaphorically, or society, as society would could consider one body means it would be a suicide, however metaphysical and philosophy it would would depend on the system and how they are.
Just know, most people with d.i.d. are not “making people up” and identities in there systems are very real.
Depends on what kinda reincarnation your talking about and how it works/memory of past life’s etc.
I like the thought that I get reincarnated into everyone ever existed and live those life’s to learn as much as possible.
25 when my therapist at the time helped me realize what LGBT actually fucking was and not what the media betrayal of it is.
Basically when someone told me what It actually is instead of a “disease” or “disorder”
Just copy paste and you will understand it.