Ignoring for a second all the controversy around the term “two-spirit”, even if we say that two-spirit is the extremely Western concept – detached from indigenous culture – of a male and female in the same body (or even just generically two genders in one body), that still doesn’t apply, because all of the entities are male. In set theory, if you keep adding the same element to the set over and over, the set doesn’t change.

Moreover, even if there were the kind of history you’re talking about, I’m not sure why dissociative identity disorder is being brought up here, because that categorically isn’t how God as multiple entities works within the fiction of the Bible. We see God and Jesus talking to each other back and forth multiple times, and that’s not how DID works. DID – a controversial diagnosis – isn’t a sitcom where two flatmates hang out inside your mind and banter. You’re dissociating so badly that you lose continuity, but God is clearly able to work as all three just fine at the same time.