I always thought it was interesting that she was nervous enough for Hawkes to grip Pierce's arm without realizing she was doing it.

I also thought it was very weird that no one but Emma stayed to see how he was after the fight. I mean I get why the Reprobates left (they know him and his abilities in the ring) and even Islington knows this. But no one cares enough to check on him? But Emma stayed. She knew he was going to escape and she wasn't going to let him do it this time (that's a sign of a really good intimate friend). She knew he needed to not retreat.

It also shows how much she cares for him, because she is willing to let Islington and Pierce go on without her. She is normally so annoyed when they do things without her, and she is willing to give up time with Pierce (the guy she likes) to be with Hawkes.