absolutely!! i love these lil guys. as a note, almost all my aus and all these ocs are co-owned by mal (shortkingkenny)

• carly - the first one! the first au she came about in is one mal and i call "kyman divorce", which is pretty much what it sounds like. creek ALSO got divorced in this au and they did it first, actually, when cc was about 4. craig and clyde get together a bit too fast after the creek divorce, but its about another 3 or 4 years before they decide to have a kid of their own. she's very softhearted and sweet, but also a lil bit dumb. she very much looks up to cc and cc will on occasion let carly tag along on her Big Kid Adventures, though sometimes cc resents her a little, feeling like craig and clyde have crafted a happy little family that she's not necessary in. they have a generally pretty good relationship, though cc finds carly's taste in men painfully dull and carly finds cc's taste in partners 😟 upsetting. she exists in a couple other aus (kyman divorce 2 which has the good ending of kyman getting back together, our stick of truth au and a few others.) she's typically friends with cleo (kyman daughter) and preston (stolkien son) when they all exist.

• riley - crenny child! i think the first au she came to be in was "crenny wacky racers", an au where freshly divorced craig finds himself flirting and crushing on a goofy regular driver at park county drag races, only to find out it's kenny under the helmet, but he's already in too deep. kenny, who's been in a torrid will they / won't they situation with kyle for years, finds it refreshing to be flirted with by someone who is willing to be open and out with him. (kyle has some internalized issues to work out.) riley is quiet and reserved, very flat affect and a little bit creepy. her biggest hobby is shoplifting and stealing stuff from people's houses, especially enjoying stealing expensive and rare collectables from cartman in particular because it makes him so mad. her relationship with cc is a little distant, not because of bad blood but because they're both fairly independent and doing their own thing. in a lot of aus riley also has jett who she is not-quite-twins with (theyre born a few months apart, crenny convincing tweek to have a baby with kenny to 'complete the set'), so she has a closer relationship with them than cc. she exists in the most aus of any of cc's siblings, i think, because she exists in (almost) every crenny au and every creekenny au. shes typically friends with cleo, though in wacky racers, she's in an antagonistic friendship with teddy because cc's significantly older than both of them.

• jett - creekenny child. they're genetically only tweek/kenny, but i thiiiink they only exist in creekenny universes. the first au they came to be in is a deeply self-indulgent genderbend omegaverse au. jett's personality i dont have as much to say about because we havent really developed them as much, but they're very close with riley. cc has a bit of a soft spot for them and babies them a little. she often passes off old clothes she either doesn't like anymore or feels she has outgrown, as a way to encourage them to explore femininity, something she can tell they want to do but don't have the nerve to actually seek out. they also aide riley in her thefts, serving as a distraction. any au where we're doing creekenny, jett comes to be. theyre also friends with cleo, much like riley.

• stevie - steek child! the newest one! he only exists in one au so far. in this au (i just kinda call it steek world), stan and tweek find each other at a low point in their lives, reuniting at a support group for addicts. cc's PISSED when tweek tells her he's seeing stan (shes 4 or 5 with a huge crush on stan, so she thinks tweek 'stole him' from her, and shes upset that tweek is moving on instead of getting back together with craig) and it only gets worse when it turns out theyre having a child. (con’t in next answer 😭)