The best the Dalish elf could do in response to the other Warden's words was frown; his intention, after all, hadn't necessarily been to completely ignore Lalin's lead, but more to put it aside in case they were able to find something that was more solid. Learning how to survive while growing up in the Brecilian Forest had taught him that there was always an outside connection to everything else inside, that a simple observation (and maybe a little perception) would give them answers to the questions they were asking themselves about the slavers. And, normally, Faer would have said something to protest against Conlan's disregarding notions, but when a cloud of dust shuffled around his feet when he shifted his weight, he was reminded that he was no longer in the Brecilian Forest, this was Denerim and things are obviously different here, that Conlan probably knew exactly what he was talking about while Faer only guessed his words.
So, unsure what to really say, he merely stood still as stone, a slight scowl on his face (that was more directed at himself than to anyone else) though he didn't notion for a nod or make any indication that he necessarily agreed. He really had to do his best to stay out of his own ego and pride, this wasn't a place where he could make judgments on a fair head, not while his mind was still so filled with the knowledge of living in a forest.
A sudden tug of his hand pulled him from his thoughts and he automatically turned towards Lalin to ask what had happened, but was faced with nothing but air as she was already a few feet away from him, briskly walking to wherever her destination had been. Then, before the Dalish mage could get another word in to inquire this sudden departure, Ordhan had already followed her suit, breaking off to leave the two remaining Grey Wardens alone. Faer meant to call out to them when he sidestepped to keep them in their view, but was instead greeted with another sight that immediately caught his attention: Falina Bjyr, the small dwarf whom he hadn't even noticed left the other members of the group until this very moment. At first, he thought that she had been the reason why Lalin and Ordhan walked away from them, but when he noticed the tall figures surrounding the dwarf, his already plastered frown deepened into a sharp and dislikeable scowl. There were three elves; one of them he didn't recognize, another one that they had recently came upon (he had been their primary information source to the slavers activity in Denerim), but it was the last face that made his stomach lurch so much that he almost felt like vomiting.
"Conlan," he called, making sure that the other Warden would see and understand the situation, though Faer didn't make any steps towards the others, but instead planted his feet where he could keep them directly in his view but far away enough that he couldn't hear what they were saying. He fell silent, his face showing a clear dislike and suspicion as his eyes settled harshly on Dolain (mirrored by Falina and Lalin's), the memories of his abandonment from the group still vividly clear in his mind. With all sincerity, he had given Dolain the benefit of the doubt, given Lalin his compassion on letting her elf friend join the group despite his instinct's protests, but Dolain had given up his right to be trustworthy the moment he dropped his bow and if he had any hopes to rejoin the group, he best think again.