I notice that brightest dawn and darkest night have solid genders, but angel and imp dont. Why is that? Were the first pair not stars too?
perhaps it was innate - the subconsciously chosen the moment they took physical form. perhaps it happened even earlier - an energy so deeply baked into themselves even before they were given life. perhaps it was how it is for all creatures - random chance.
or perhaps heaven chose its most decisive stars for the mission - ones that would settle into a binary as easily as determining black from white, or day from night. perhaps it felt the mission necessitated a strong sense of identity.
perhaps when choosing imp and angel, heaven thought a different approach was needed. perhaps it all happened so long ago that no cat may ever know.