Why is there no Star Guardian Aurelion Sol?

I get the whole sailor moon theme going on with the star guardian skins, but wouldn't it make sense to have a slightly more expensive skin, not necessarily the same as the star guardian skins but definitely related to them, where Aurelion Sol is like their leader-but-not-leader who just sorta sits back and gives sagely advice because he was once a star guardian but he's retired now or something.