Re: arrival.
Rose is absolutely NOT a sit around and wait for answers kind of girl, so she is absolutely on guard, looking around, both for her people and trying to scope out the situation immediately.
Jim is going to be doing much the same thing. He'll be curious, but on guard and exploring as much as he can.
Stefan is more quiet and low key about his explorations, but he'll be reaching out with vamp senses and trying to figure out what the hell is going on.
Veronica is pretty much WTAF about this. She'll do some looking around, but not a super lot.
Jacen will be reaching out with the Force and trying to suss out the situation, make sure his people are okay, etc. He has his lightsaber, but won't activate it unless he senses an imminent threat.
Faith is low key looking around, but confident she can handle whatever's going on.