He was a little startled at her laugh, because while designed to sound natural he could almost hear the forced effort behind it. He didn't know her well enough to know what her natural laughter might sound like, but the present reaction was unsettling.
Connor's LED flickered to yellow as he watched Dolores while Markus spoke. He was trying to assess her stress levels, but her databanks weren't compatible with the tests he usually used on other androids. She was too different, a confusing thought as he looked at her now. The detective prototype wasn't sure what he could say to add to it either, to ease her mind if she seemed distressed.
So he turned his attention to Markus as he continued, falling quiet, wondering how Dolores would answer his questions.