Jess/Marco
There was, Marco had been told, absolutely no reason that the leader of Camelot would need a bodyguard for a celebration that was made up entirely by members of Camelot, and happening entirely within the boundaries of Camelot's wards. Daniel had tolerated Marco's security sweeps, and everyone else had tolerated Marco skulking by the entrance for at least the first part of the party while the majority of the guests were arriving, but Marco knew just as well as everyone else that this, of all days, was the day that Daniel was perfectly safe and not at all in need of his services. Technically, Marco wasn't even on the clock. He was a guest at the party, too. If he'd really wanted to, he could have chosen not to come at all.
Except he couldn't. It didn't matter whether Marco was on the clock or not. He was responsible for the life of the leader of Camelot and that was a responsibility that he took very seriously. He'd been guarding members of the extended Morgan-Evans family for most of his time working at Camelot and he'd rarely taken a day off then. Now... he knew Daniel wouldn't like to think of himself as more important, necessarily, than any other member of his family, but that was exactly why Marco had to be extra vigilant.
There was only so long he could prowl the party itself, though, before he had to admit that there really wasn't anything more nefarious than the twins doing something to the punch—that was one guard duty he was glad he hadn't pulled, Lazarus (Noah, he kept forgetting there were two of them around instead of just one of them in two places at once) had to have the patience of a saint to keep up with the boy without tearing his hair out and Marco wasn't sure how you were supposed to guard the girl at all when she could apparently pop herself off to somewhere else whenever she pleased. They weren't Marco's headache, though, and as long as he avoided the punch bowls and any food that could hide some kind of surprise whatever they'd gotten up to didn't have to be, either. He had hours and hours of free time, which was something that Marco hated with a passion.
Lucky for him, those earlier security sweeps had given him the chance to scope out a prime spot to watch the rest of the celebration from without having to participate in it himself. If Marco didn't do free time, he really didn't do parties. He just wanted an easy place to hang out in case there was some reason he was needed, some emergency that required Daniel to go somewhere that he'd need a bodyguard for, but where no one would actually try to socialize with him.
Which meant that, of course, his spot had been claimed when he made his way back to it. And, of course, it was Jessica fucking Williamson that had taken it. Marco scowled at her as soon as he got close enough for her to see that he was scowling. "I was sitting here."
Okay, so he hadn't been. He'd still planned on sitting there, and he'd planned on it before he'd seen her make her way to the party at all so that meant that he had dibs.