| Calder Njalsenn |
I'm not aware of any in APs. Even Strange Aeons (the most "occulty" AP) doesn't have any.
One note on the NPC in Captive in Crystal: it is seriously under-CRed. It is a monster with class levels so determining the total CR is based on what role it fills. The problem is that Paizo never defined the key roles for any of the classes past the CRB. So the author chose to treat them as not matching, essentially giving the CR3 monster four "half-price" kineticist levels. Really, a kineticist should be keyed to the combat role, maybe multiple roles like the barbarian, fighter, and ranger. Which would mean no half-price levels and that would increase the CR by 2. The author also used the heroic stat array, which should have increased it by another 1. It's also a great race to choose for a kineticist (but that doesn't have a listed CR adjustment). So the true total CR of that kineticist should probably be 3 higher than listed.
That's not to say the Captive in Crystal kineticist is an impossibly difficult enemy. It's just that it's quite a bit stronger than a typical "Paizo enemy" of that CR.
Understood, thank you anyway!