Dalavesta could know that alright, as it doesn't change much. Anyhow, I don't really know what to do with her and don't have much time to develop her, sorry.
The conflict... well, as usually Grace won't engage offensively, it's against her personality, obviously, so whatever happens will have to be initiated by your character. I'm waiting for someone other from the Kastor's group to post, as without this it's pretty one-sided.