Let's go over Kou's aspects.
Has no need for food, only his host needs to eat, but doesn't really feel the hunger directly much.
Has no sex drive to speak of, no mention of him feeling his hosts sexual desires. Of course that makes sense since including sex between creatures, or desire for such, would probably be way too weird for most people. But regardless of the reason the author choose it this way, its clear that this is the result.
Is immortal as far as we know (both unaging and unkillable). So has no need for security. Since it's monsters zhe possesses aside from the cat and dog, zhe has no worry about host death at all.
Zir(his/her) sole drives seem to be that of stimulation and more importantly, companionship.
So zhe could only be-
As zhe is, generous to a fault because zhe has no reason not to be.
Or zhe could have been someone psychotic, deriving pleasure from manipulation/pain etc. AKA evil.
Or zhe could simply not care about anything and just sat there for ever, and then we wouldn't have a story.
So why would it make any sense at all for Kou to hold any kind of grudge against the captain or the team for killing zir first host? If zhe had such a grudge, that would have been weird. Thanks to zir first host dying, he got to get out and try other stuff.
Also, they don't make it nearly as clear in the comic as they do the novel, but those guys thought Kou was a likely scam of some sort. Sentient/nonaggressive monsters are simply unthinkable in this world. So it makes sense that they would figure it to be a trick. Besides, these are mercenaries living from pay check to pay check, so if they felt they had to kill someones pet to get by financially, well so be it. So it wasn't very good of them, but hardly comparable to that horrible brigand thug using the women as living shields that he originally kidnapped and was doing and going to do all sorts of horrible things to, plus other villagers robbed and killed and so on.
Also, I like MC who are super nice and generous, fun to read, as long as they aren't dumb about it.
Edited by truepurple, 22 October 2016 - 08:01 AM.