Chris & OTA
Of course Chris was going to be here, there were people he knew and Jill was here. Never mind that there were plenty of people here who were capable of doing something in the event that something happened, he was on the Guardian roster -- and they weren't dropping that just because Rose and Dimitri were gone.
And he knew Kira was around somewhere -- or would be at some point, if she hadn't gotten there yet -- so things were more than covered.
All the same, though he wasn't keeping an active eye on Jill, Chris was on alert -- because once a hunter, always a hunter -- as he moved around the party.