Where is Ceri? I thought I had all the nymphs but when I try to go to S…

Where is Ceri? I thought I had all the nymphs but when I try to go to Shaenlir, Lya says she has to get all the blessings. I know I have the rest. I guess I must not have Ceri. Is there a way to tell which nymphs you have? Where do you get Ceri?

Also -- Is there a way to get the north wind if you released it to move the troll?