Never played it
And well, Sky doesn't grasp these concepts amazingly. He had priorities, and human life is normally secondary. Loosing his first companion in three thousand years is pretty high. And, well, I think it would be best to kill off your character at this point. Not an order, but a suggestion. His crazy ravings would probably interrupt a few mini-arcs if left to themselves. But yeah, for Sky, the fact they are poisoned isn't much of an issue. Once he gets them back up the the surface, I'm probably going to grab several water spirits to purify and heal the others. It's a bit like a few humans dying to an eagle- they couldn't really have a great urge to help them. Apart from a few he's probably grown attached to, like the cave trio and the guys that helped him fight Viiper. It's kinda hard to explain, so all the stuff above isn't completely true, but it's the closest I can get. If I have more time, I'll see if I can put a better description of Sky's feelings towards humans
What, which cave trio? There has been two different cave encounters with different people.