>>50182906I didn’t come up with the “astral” thing, that’s just a common interpretation I heard of. Same with the interpretation that the line is inspired by angels. I’m not the one who came up with that, it’s a common interpretation.
With Gothitelle, it’s pretty easy to see that it’s supposed to be “Gardevoir, but dark and edgy” just by looking at its design, and it’s lore helps to cement that idea even further. They even appeared together in the anime. The only way it could be more clear is if some character started screaming “THESE TWO POKEMON ARE SISTER SPECIES”. It’s incredibly obvious this is what they were trying to do.