everything's defintely totally correct and canon

Friend I believe they do? In my head they definitely wear designer out and about, but within the castle the rules of when to actually wear clothing become a blur. If someone, somehow, for whatever reason, just burst through the door one day or peered in through a window or something, they'd see a LOT of parts out, as I really doubt the majority of them (save for a few) care but at all about things like that. Plus, it's much more comfortable just to trot around butt naked, ya kno? Or just with some basically transparent fabric wrapped around themselves, because sexy tm.

But just for shits and giggles, lets try to imagine what kind of clothing they'd wear.

Sulpicia goes for those transparent fabrics, titties and everything out, it really bodes well for her because she picks them floral and it's easy to deceive people and make them think you're an angel when you're actually devil incarnate. Hell if I know if that's designer or just pure evil. Aro goes all in. He's got leather pants and he's got long coats and probably very few shirts. Sometimes he does wear shirts when he wears other types of fancy suits. Whatever. You know what I'm saying. Aro's the only designer Aro needs. Caius doesn't mess around. He's the one who's barely ever not wearing clothes unless the occasion asks for it. He's all dark tones and proper clothing. Three pieces, heavy coats, if the weather calls for it, leather gloves. Kinda designer, but eh. Athenodora doesn't go far from Caius in that regard, as these two are the only ones who should be in charge. She'll wear a nice pantsuit with a pair of heels, and she'll look like a proper CEO. Designer, but make it subtle. Marcus wears the same old gray coat for years and years, until his covenmates burn it. I kid. But he doesn't invest a lot in his clothing, as long as they're comfortable — it's good. Not designer at all. (Starting to see that my 'they walk around basically naked' only applies to the first two. Oh well.)