Xander - Babs ; Cara (later)
Xander couldn't sit around and do nothing while there were epically crazy demons knocking at their door. Force lightning their door, even. Whatever the case, he certainly had no intention on sitting around on his ass and waiting for the fight to be over. They could handle the comms well enough without him (especially with Babs in charge); Xander wasn't the best fighter in the world, but he knew that any and all help out on the field at the moment would be a good thing at the moment. Buffy would have wanted him out there right now. That was the biggest encouragement of them all on his part. She might not have been here to fight with them, but Xander was going to make sure that he put up a fight worthy of making his best pal proud. All he'd had to do was fish out some supplies from his room and kick off around the back end of the building (because, seriously, Xander was not about to go off and walk out the front door with crazy Jacen right there!).
Xander wasn't a moron. He wasn't going to go walking right on into the heavy fire. Instead, he planned on working on the outskirts. Steering clear of Jacen and those with abilities that would make the demons even more of a threat, Xander dodged Spike zipping by on his motorcycle and pulled out a pair of waterguns. He walked forward, lifting each of the multi-colored waterguns at his sides, located a demon that didn't seem to be wearing the face of one of his fellow comrades, and began to squirt holy water right at it's face. Right on cue, the demon began to scream in agony as the water burned at it's flesh. Xander reached into his pocket and yanked out a crumpled sheet of paper. It was the exorcism. Well, some of it. Xander had been working on memorizing the damn thing - he was almost there - and he needed a little leverage on the ending.
He wasn't stupid enough to focus on reading the exorcism out in the middle of the field though. Not without making sure that he wasn't going to be attacked in the middle of his reading. Xander fired a bit more holy water at another incoming demon, threw a few more shots at the one that he'd hit at first, and began chanting quickly as he kept his eyes trained on the surrounding area and the demon he was trying to send back to the pit it had crawled out from.