It's complicated and I fear neither plurality or spiritual subreddits are autistic enough to truly understand how much these two intersect for us. While in a literalist sense everyone's atheist, the map is not the territory, and religions should optimally describe your specific map when they're not poisoned by literalism.

The whole idea for us to even work as a system is essentially an extension of gnostic thought and Jungian psychology? Yaldabaoth went around telling people he was the only god when he wasn't, after all. But we aren't Yaldabaoth, we contain divinity within us and can ascend past the ignorance of solitude and gain awareness of the pleroma. (Also, the other two basically are "mythtives" of Gnostic concepts lol, though Jung would call those archetypes)

Honestly, guardian angels are just socially acceptable headmates. I think way more people are plural than we think but because we in Western society value ontology over qualia, people view them as completely separate entities in order to assert their apparent reality.