The timeline for this AU can be a bit complicated. With how it's starting in the prologue, you'll be getting bits of events that took place immediately after s4 ep14, then a skip to the events of ep201 with the stories catalyst. But the bulk of the stories events take place years after when the characters would be teenagers.

Anywayyyyyy,,

-Philip, Herbert, and Estella sleep pile. Well,, it isn't really sleep piling as much as it is just falling asleep together. So, it's more like a situation where they could be, for example, sitting together outside and just drifting off; sort of just leaning on each other. This, of course isn't really lore relevant but something that'll probably prop up a lot lol.

-Damien is like a not-so-human human heater. It's been a long-standing headcanon of mine that as a demon, especially as one with pyrokinesis, Damien's body temperature is warmer than average. Ofc, in Hell, it's more balanced out/cooler. But granted the fact that Colorado's climate is much cooler, his body adapts to be warmer. So, of course, when you have a friend that's a living heater, and Winters get cold as crap, you can imagine that a lot of the others gravitate to him & stick closer. He doesn't mind it tho (he actually likes it, but he wouldn't admit that).

-I may or not have touched on this in the AU intro or not, but Christophe has a collection of old World War artifacts. Some he's bought from collectors, some from pawn shops, and even a few that he found himself while digging up around South Park (mostly his backyard or at the edge of the woods).

-Philip is good with his hands & arms. Welll, this is semi canon. But I still want to touch on this. Most of us, of course, know that Philip is a strong thrower (see the dodge ball episode lol), and it's often a common headcanon that he's a good archer (due to a canon in the original Great Expectations; I haven't read it yet tho). But I think it goes a bit further. Basically, I think he's also good at more fine (??) work, for example crafts like crochet. This is something that is kind prevalent & lore related. You'll see what I mean by that later though.

-Herbert, how do I put this, sort of 'keeps tabs' on the animals he interacts with. Nothing too weird or complicated about it. But, after he goes to South Park--and even before that, he would keep journals or notes about interactions he's had with animals. At first it's mostly his bunnies but he eventually accumulates a whole collection. For him, it's just a way for him to remember little details that he might want to bring up again, or just to be considerate. He may also use it to share stories that he hears about with friends.

-Damien & Kenny are friends. Since Kenny more often than not ends up in Hell whenever he dies, he eventually encountered Damien and they grew close. All this to say, if he isn't hanging out with the other foreign kids, he's probably with Kenny and Leo/Marj =)

-Rebecca & Estella hang out sometimes. They're sort of friends?? Except they're both extremely cautious of people so, more like close acquaintances with common interests. Their hangouts typically just consist watching shows like Law & Order SVU, House MD, etc. They both like analysing and predicting stuff that may happen (Estella likes to try and read people's intentions--habit she picked up from her power & Rebecca likes guessing diagnosis and prognosis; foreshadowing? Perchance). =)

-Philip & Herbert both have some level of chronic pain. I very much still need to do research on Hepatitis B, so correct me if I'm wrong about anything. But I imagine that, granted how severe his case had been, even after recovery, he often dealt with aches and pains. He doesn't like to draw attention to it, so he often tries to ignore it. Most of the pain is in his sides and legs. But it does slow him down, so sometimes he may just try to sneakily take pauses to rest or sit for a bit (it's also usually how he ends up chatting with any flora or fauna he encounters). Between cracking his noggin, getting literally crushed to death & revived, and previous injuries he'd sustained from his parents' deaths, Philip ends up with a lot of pains. Especially when you realise that he never got those injuries properly treated. They are very occasional and sudden but hurt like all hell. They occur mostly through pain in his left wing, knees *(a bit of projection there... erm...), and migraines. So, if Philip doesn't end up passing out or just never getting up for the day and sleeping. He ends up being incredibly irritable and anxious of other people (not really his friends, but he and Christophe definitely end up squabbling more, and he clings more to Herbert & Estella. Partially a harpy/avian thing as well; birds try to hide illness so he instinctively gets more anxious of others so they don't realise he's vulnerable in anyway). He has adapted to this a bit, mainly with his archery, he gets a bit better at shooting in lower positions and stuff like that. However, his wing injury and pain adds to the unlikeliness of him ever flying. =/

*I don't really have chronic pain, Idts. But I do have some issues with my legs--mostly my left knee, that has worsened a lot lately. Dw, ya boi's fine. I think.

-Damien is prone to the sniffles. As I'd said before, Colorado's climate forces Damien's body to adapt. But, it's sometimes difficult to manage between being in heated spaces and cold outdoors, and just him not being entirely used to how cold it gets. So, even with his natural heating system, he gets sick often and has to bundle up more. Or, there are even instances where he has to cool down since his body may overheat to compensate. (Why are bodies so weir, dawg.)

-DAMELY IS CANON Now, I definitely gotta explain this one. Subjecting you all to my random rarepair lol. Damley, AKA Damien x Bradley is a rarepair ship that I've come up with. This ship has no real catalyst other than me randomly coming up with it. In case you don't remember Bradley, he's the kid that Butters befriended at the conversion camp; can't rmbr the episode... I just thought "Hmmm, traumatised ex-catholic with internalised queerphobia... & the fucking Antichrist. Perfect, makes sense, let's do it." Lol In this AU, Bradley has ice related abilities which becomes a bit of an issue in Colorado climate; he has issues maintaining body heat. Soo,,, hehehe. Add that to Damien's own issues with the weather, they end up clinging to each other often once they bond overtime. He and Damien end up getting close through mutual connections with Kenny & Butters. This ship isn't too relevant or nothin'. It's just there.

-Philip and Butters are friends. The two aren't extremely close. But do get along well. They mostly bond over their shared interest in the game: Nameless Cat. (Totally not because I hyperfixated on it at one point.) They both really like the game and try to do races or give each other tips & hints on getting through puzzles. They are frens =3

Okay, that's all that I have for now. I hope that my, like, 6 fans like it. =>

Edit: Came up with more ideas after posting this so

-Philip and his harpy things lol You think I wouldn't embed Philip with avian behaviours, did ya? One, he has a few vocals--a good mix between corvid and owl. He often makes the 'basic' vocals, think random coos when he's focused or the avian equivalent of 'bruh.,' etc, etc. His corvid genetics also make him pretty good at mimicking tone and accents (which he totally doesn't use in masking--sarcasm). He also has certain traits & mannerisms that he only shares with those really close with him. For example, he doesn't 100% get preening. He was too young to have mastered it and no one taught him after his mother's passing. And, at the gentleman's school, he was discouraged from it because it was 'unruly.' However, Estella & Herbert began helping him preen his feathers and it's a habit that they ended up keeping. Also, bonus, he has a few feathers that grow in amongst his hair. It isn't too much of a bother until he's brushing his hair and accidently tugs on one lol.