i'll try to go foward with her quest then, i for sure don't like how she treats Cait so i was avoiding any interactions with her
Lyriel is a total bitch at first, but that's completely intentional on the part of the writers, and the reason she acts that way will make a lot of sense once you get to know her more. She's probably the most complicated of all the characters so far, and her story is really worth the time.
Oh, and the stuff between her and Cait, in particular, really, really pays off.