Brad could have kissed the annoying, clicking guy. Could have, but didn't, because that would have been pretty fucking weird. 'Hi new person! I'm going to make out with you because you saved me from the other guy who wants to make out with me or something!'. Yeah, that didn't make a whole lot of sense.
"Oh well, maybe next time," the Daeva said cheerfully to Vorigan, then regretted it, because he was pretty sure the Lord would take him at his word. "Hi, Val! Kate! Great to see you guys!" The weak creature inside him sniffed the air at the blood trickling from Jack's nostrils, so he tried his damnedest to inch away while Vorigan dealt with that.
Probably a good idea not to go any more nuts than he already felt.