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.
I can't stand certain people I can't block because of how much they change instances, (looking at you cm002) like it's always seems to be a lot of people just posting links to news sites of varies kinds and just post the link with the title and no matter how much I block the communities and people they keep on coming up.
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"
Probably will all die because it ain't sg-1.
Makes sense. Everything in this universe sucks. Ha. I'm funny. Anyways...
Just copy paste and you will understand it.