Is it possible for more than one Heiress to be on Alternia at once? We do see the blood of a fuchsia-blooded lusus in one page of Hivebent.

More than one Heiress is Unlikely, but I’d imagine Fuchsia Grubs COULD be born while a Heiress is alive! Which may actually get them insta-culled. Of course there’s Fuchsia Lusii though, there’s a surplus of Lusii of every Caste.