the children of the law of one say that souls (which would include angels) that haven't descended to a plane of duality like this planet are whole, with both the aspects of masculinity and femininity
when angels came down to atlantis to help out the planet, they eventuality polar opposites into as most things do here (male/female, north/south, hot/cold, positive/negative, good/evil)
their teachings say that we all have a "soul mate" (or soul group) somewhere out there that is effectively your opposite personality and you are meant to return to god/heaven/whatever together