TESLY&CLARISSE:; If Tesly doesn't do anything to upset Clarisse - intentionally or accidentally - then she should stay on her good side c; Clarisse is the head of the Ares cabin and can be quite the bully. She also does a lot of the training of campers when Chiron's not available.
TESLY&TOBY:; Friends! Not many people dislike Toby, just saying lmao xD Toby can be a bit awkward too, but if you're looking for a good-hearted, loyal friend, he definitely has both of those qualities. Despite crap he's gone through in the past, he's a very positive person and enjoys hanging out with friends c: His friends are often his muse when he's writing songs.
TESLY&ERIN:; So Erin is a Roman demigods, but being the son of Apollo, he's also Greek. He goes to the Roman camp but his brother, Toby, goes to Camp Half-Blood. Now that he knows Toby goes to the Greek camp, he's likely to visit/sneak in to see his brother. If these two were to meet, I can see them being adorable friends.
TESLY&ZOEY:; Meet Percy Jackson's little half-sister! Zoey is a bubbly and fun-loving daughter of Poseidon ^^ I can definitely see these two being friends. She's loyal and protective over her friends.
TESLY&KYLE:; A Roman son of Jupiter, these two probably aren't very likely to meet. Even if they did, it probably wouldn't go over too well. Kyle doesn't like the Greeks, at all.
TESLY&KEVIN:; Socially awkward friends? Kevin's a quiet, shy bookworm who is terrible at making eye contact and stutters a lot. I think they'd be adorable.
TESLY&SOL:; Probably acquaintances? I can't think of much for these two.
TESLY&SAMUEL:; Sami's an Egyptian demigod, but I can see these two actually getting along if they ever met.
TESLY&ZACHARY:; Zach's a Norse demigod, but they'd probably get along fine if they met? Zach would find her awkwardness adorable and, depending on how close they got, might treat her like an older sister. I'd say they might not be likely to meet, but they can always meet outside of their camps.
TESLY&LOKI:; Ahaha probs best to keep Tesly away from him o-o he has a habit of hurting demigods.
TESLY&NICHOLAS:; Meet Khalessi's half-brother! Nicky can be cocky, however he's usually more prideful than cocky when it comes to his looks. He thinks he's hot and I agree -cough-. However these two might be able to get along alright. Maybe not friends but not enemies?
TESLY&NICO:; Those who don't know Nico tend to be scared or intimidated by him, but he'd never do anything to intentionally scare or intimidate Tesly. I think they'd get along fine if they got to know each other.
TESLY&CASPER:; Now here's my really cocky demigod. Casper is the son of Nike, the Greek victory goddess, and thus he never looses. He thinks he always gets what he wants. He's very competitive too. He's not rude, but very cocky.
TESLY&ICARUS:; Friends, I'd think. Icarus gets along well with almost everyone. He's very loyal and protective of his friends.
TESLY&ATË:; Atë would probably try to either manipulate her or kill her to piss off Hecate, so probably best to keep these two apart ^^"