do all fuchsia blood have a horrorterror as their lusus?

Im not 100% sure for gl'bgolyb always being fuchsia bloods lusus, but wasnt it like a thing that doc scratch put it on the planet for the condesce to take care of that was passed down to feferi to take care of? So in a roundabout way to answer your question, probably?

For your second question, eridan helped out feferi because he had a connection with feferi, I dont think its strictly needed for ALL violet blood to help feed lusus to gl'bgolyb, so no, I imagine anyone can just help feed it as long as it got a steady stream of food.

can confirm everything above. i can't speak to trizza in hiveswap but if i had to guess seeing as hiveswap is a prequel to homestuck, it would stand to reason that gl'bgolyb is also trizza's lusus. as @kit kitthrin said, gl'bgolyb was basically (according to doc scratch) part of why the condesce accumulated power bc she basically had the football to kill everyone at any given point that was then passed down to feferi as she'd gone too far from alternia to reasonably take care of her. that same scratch spiel mentions that heirs were expected to challenge the condesce for her throne, and only two fuschia bloods ever exist at one time. see:

"But the more space she put between herself and Gl'bgolyb, the more she risked weakening her bond with the monster. The bond she and her successor shared with it exclusively could sway, and become strengthened with the younger. Perhaps she grew complacent with the threat successors posed, after such a long history of killing them with ease. Heiresses upon reaching maturity were expected to challenge the Condesce for the throne. It was not merely expected of them by their people, but demanded by their shared lusus." pg 4063

I do think that it is not likely but also not impossible for multiple fuchsiabloods to be alive at once, or certainly at the very least born within relative closeness to eachother and then horribly murdered by the current most likely heiress to be (or at the very least like makes a law to kill or exile them or whatever) which leaves the perception of only two being alive at once. but like we are speaking bug reproduction here there’s probably so many weird little grub babies being born all the time like statistically speaking there’s going to be some kind of shade of pink going on yaknow

I have a fantroll that plays with this concept. she lives alone in a frozen wasteland and her lusus is a tiny magical girl mascot lookin guy who floats around in a bubble. she is blissfully unaware that she very much so is supposed to be dead rn and is overconfident in her ability to best others in combat. but of course fantrolls are allowed to break rules (to a degree) for the sake of fun and interesting ideas and interactions

I like to imagine that, on Beforus, Feferi had a giant comfy cuttlefish as a lusus. Although it kind of begs the question, what is the social function of lusii on Beforus? Does the culling system supplant the need for lusus childrearing, rendering lusii to the status of interesting pets?

If I recall correctly, there is fuchsia blood on the ocean where Eridan and Feferi culled many lusii to feed Gl'bgolyb, so that means there are other lusii with that blood color, and that its possible for a fuchsia to have a different lusus!

Gl'bgolyb has a psychic link with all of the Condesce's bloodline, so I imagine the other lusus would have to get in pretty quick

re: kit kitthrin

"Im not 100% sure for gl'bgolyb always being fuchsia bloods lusus, but wasnt it like a thing that doc scratch put it on the planet for the condesce to take care of that was passed down to feferi to take care of? So in a roundabout way to answer your question, probably?" that i remember since its one of those things that stuck out to me when reading so i guess it does answer my question lol, tho it does begs the question of if there's been different iterations of horrorterrors that fuchsia bloods have to take care of. given the fact that horrorterrors live a fucklong of years its a bit silly imagining them arguing over who get to stay with the current fucshia blood pfft

also the second answer is good to know since if my violet blood had to be in charge of providing food i think hed be more depressed than he already is

@jakemorph

that is also working under the assumption that any troll with a fuchsia hue is directly related, which we know is not the case for other blood colors, just certain ones are born more frequently than others, and it’s implied that there are various mutantblood colors out there that are just instakilled as soon as they are noticed, and this is presumably the same case for limes and contesting fuchsias. my thought process here being that if we know that some blood colors can just Come About by chance via whatever sort of weird color mixed goop that is given to the mother grub then it’s also possible that rarer colors are recessive or mutants in of themselves just Special Ones that society deems good and awesome and cool.

i do kinda agree with what @autumn said about the multiple fuchsia blood being born cause surely there had to be at least a COUPLE that popped out before they were murdered to keep the status quo of 'only two fuchsia are allowed to exist at once'. tho it does lead to an interesting possibility of pulling a dolorosa and taking one of them away which i think is pretty cool

(also thats a cool concept for your fantroll i love it

re: @magic mirror

you make a damn good point about that youre right- i guess theyd really just be glorified pets huh

Well, yes, I am working under the assumption that if there is only one adult in a certain caste, then the young from that caste will be descended from that singular adult. I shouldn't think that's a super weird assumption.

This is a pretty classic case where if you're asking for the canon answer then it's pretty clear the Condesce and her descendant are always the two fuchsiabloods and therefore they always have the same lusus; but if you're asking what you could do for a fantroll then yes you could very easily come up with an excuse for an outlier existing.

re: jakemorph

no youre right sorry about that dude - ty for responding anyways! much appreciated