Phoenixal

Not to be confused with phoenixian, a term for headmates reborn from their sourcePhoenixal:

Phoenixal is a term that describes alterhumans (and others who feel this label fits them) with a particular kind of past life, believing that they died or otherwise left their past life, and were born again into this one. They may additionally believe that this process has happened many times before, and will continue in the future.

Related Terms
Fenigenic is an intentionally broad system origin that describes ones that formed from past lives in some way, and a fenitive is a headmate who is phoenixal.

A feniject is a headmate who is introjected from a past life, but is not a reincarnation.

Reincarnitive is a term for a headmate who is or is sourced from a past life, being the reincarnation of the reborn/remade life, and could be synonymous in some cases.

Previvmate is a term for a headmate who knew at least one other system member in a past life, and has ended up in the same body in this life.