Most of your questions you will see resolution on screen so no hints here from me especially around Kaz & Pekka relationship.
Just one clarification. The girl with Kirigan is new to this season - Fruszi. The last we've seen of Zoya was at the end of last season when she parted ways with Alina/Mal and the Crows trio. She was very disillusioned with Kiringan and she went to check if any of her family survived the town being eaten by the Fold that was moved by the Darkling.
I will forever fangirl over Nina in my corner. You were so on point she will snag that info before Kaz finishes exposition. They have one of the funniest new relationships in this season.
Jesper only recognizing Wylan when on top of him in darkness is peak Jesper.
Cheers and hope you continue to enjoy this season :)