Cassandra was a bit relieved at Bruce's arrival. Stepping away from Barda, she silently communicated to Bruce with her eyebrows and a smile that she wasn't trying to pick a fight with the large soldier woman. Honest.
Though she did have a feeling that such a fight would actually be awesome. And painful. But mostly awesome.
She also silently inquired if Bruce wanted her to stay or leave. Judging by the way Bruce and his guest interacted, Cassandra could tell that the two had history of some kind.