Carissa is finding staring out the viewing window looking for would-be rescuers too engrossing to do anything else while...not being engrossing at all, actually, not absorbing even the tiniest fraction of her attention.
She needs to learn some self-discipline. War isn't artifact-making, isn't about finding a quiet peaceful flow in which the magic moves like silk through your hands and the pattern you want it to settle in is blindingly clear. War isn't making-friends-who'll-let-you-look-at-their-artifacts, either, the tightrope walk of being entertaining to people stronger than you without, you know, tempting them, or earning a reputation as a slut, or prompting a complaint to your superiors, or particularly lingering in their minds. Being around other people is dangerous but it's engaging in precise proportion to its dangerousness; the high stakes parts feel high stakes.
The stakes are high now and what she's doing is staring through a viewing window, looking for movement, and making conversation with her prisoner in case it's useful to Cheliax for him to be inclined to partial cooperation by the time they get him (it might not be, but it can't hurt to get him there; it's not as if they can't torture someone inclined to partial cooperation, if they decide it's a good idea). And she's bored, and going in circles.
You can only get one thing in life. Well, many people get no things in life, many people are born in Awaiting Consumption or something, but. You might get one thing in life, you won't get two. This isn't Asmodeanism, it's practically a mathematical principle, showing up in spell design as much as anywhere else: if you are trying to achieve two different criteria, the thing that achieves both will be worse at either of them than the thing you'd do if you were only trying for one. This is why you can't, really, care both about yourself and about other people; either you'll always choose yourself where it matters, in which case you're Evil or you're not doing enough to protect yourself, in which case you die and are probably destroyed more or less utterly. Anyone asking you to care about other people is asking you to be destroyed for them, and anyone who cares about other people is bent on their own destruction - not consciously, but in terms of the predictable consequences of their actions.
She would not presume to imagine how Asmodeus feels about this but if it were her who was a god she'd mostly feel really really annoyed. All these people who could be valuable, who could matter, pointlessly choosing self-destruction instead, and if you yell at them their whole lives you can get them to mostly limp to safety, whining the whole way about it -
- obviously from Asmodeus's perspective she too is limping around being very whiny but she is at least limping towards safety. She thinks. She at least isn't deliberately choosing something else.
It's less mysterious why Leareth isn't Good; apparently he gets up to a lot of Evil adventuring, in preparation to invade Valdemar, presumably to reclaim the crown or something, why else be so obsessed with invading a specific country decades down the line when the strategic situation will have changed. But - he's ....Good enough to be impossible to really ally with? He is trying for too many things to actually try at protecting himself. He might at any time decide it's worth being destroyed utterly for the sake of cows. You just can't work with people who are like that, not really.
A bird moves in the tree beneath them and she startles violently. The locals don't have polymorph, or familiars. It's just a bird.