..."random githyanki" (is Lae'zel special at all?) and...
I think Lae'zel might be more than she's told us. She talks to that githyanki knight like she's higher than he is unless we intervene...then they attack us, but that's not the point...
I picked up on that too, I've begun to wonder if her constantly referencing Vlaakith as the mother to all Githyanki is more than metaphorical for her.
If you really want to know if your companions are
hiding something from you, look at this:
Looking at this I find it especially telling that Lae'zel is the only character that doesn't get an option that deals with her past.