So we're super in diaspora and definitely not experts yet, but we've found the concept of soul dualism present in many precolonial Philippine societies really helps us describe our experience with the tools our ancestors had, and our multiplicity is part of what we think is calling us to try and do some babaylan training! Mostly just tossing this out to say that in addition to being separable from the body, "souls" don't have to be a one-per-body affair.
So we're super in diaspora and definitely not experts yet, but we've found the concept of soul dualism present in many precolonial Philippine societies really helps us describe our experience with the tools our ancestors had, and our multiplicity is part of what we think is calling us to try and do some babaylan training! Mostly just tossing this out to say that in addition to being separable from the body, "souls" don't have to be a one-per-body affair.
Additionally, this article about religion in speculative fiction and gaming contains a really succinct argument for why it's important to recognize possession/channeling/etc. even if you don't subscribe to that belief system yourself, and it can be easily mapped to multiplicity as well: https://jamesmendezhodes.com/blog/2019/9/1/best-practices-for-religious-representation-part-i-check-for-traps (scroll down to the bit about Legba).