Before everyone gets too freaked out, just a word regarding the whole eating thing...
One, vore implies some sort of sexual connotation. Sorry. Not happening. At least not among the humans. They would be eating because they need to and not because they get off on it. How the more carnivorous halmon regard humans (or each other)? Well, that's up to those of you playing monsters. If an arachne finds some pleasure in seducing and then eating his/her prey, that's up to that character's player.
Two, while human society at large in this world does eat certain halmon, the hunters as I'm seeing them will probably be far more concentrated on capture than killing. What happens when (if) they get back to civilization is another matter, one for the GM. In the meantime, however, my humans will be focused primarily on capturing prey alive. Death can still happen if there's reason for it, but in general they'll get paid better for bringing in living (fresher) prey than weeks old dead meat. If a player wants their character to be eaten? Well, we'll deal with that when it comes and probably behind a spoiler. Will there be references to humans eating things like holstaur jerky and butchering carcasses? Yes, most likely. It is a horrible world. But I am not going to delve into great and graphic detail over it any more than I would in writing about myself eating beef jerky.
A side note regarding gore: These are professional hunters/trappers, not sadists. (Well, maybe one or two of them, you always get a few in every crowd). If character death does occur, it will a) be with the player's consent and b) be done efficiently. They wouldn't stand over the prey cackling maniacally as it lays there and suffers, plotting out pointless mutilations to commit just to get their jollies (unless that's what someone REALLY wants for their character and I've had more than a few stiff drinks beforehand); there's no profit in it. Some torture may occur, yes. Branding, the harvesting of antlers or horns, stuff like that... But it would be work related as far as the humans are concerned, not pointless or needlessly gory.
Three, as already pointed out, once captured or trapped, escape is possible especially if the halmon work together and/or work on swaying the few humans who might be sympathetic (I did mention that before, yes? That a couple of the hunters might be pliable? Even *gasp* leaving options open for forbidden romances!) It is also possible to kill the humans! Again, resistant to magic does not mean resistant to claws and teeth and spider webbing.
Four, your character does not have to have anything to do with the human hunters at all. Work with the GM! Talk to each other! Come up with other interactions! Maybe there's rumors of a secret elven haven or treasure trove that the halmon would love to find? Maybe they're heard tell of a place that's never seen humans? Maybe they suddenly find themselves with a human baby or young child and have to figure out what to do with him/her? Maybe there is a type of rare, dangerous monster that the characters could strike a deal with? Maybe some halmon are working on creating a new food source that humans can use instead of killing off the golden goose? The possibilities are endless, really!
Five? And here is the really silly thing about me... Communication. Respect. Working together. As writers in a group RP, we would be partners. I would hope that during the story we would talk with one another, express our desires, and be willing to trust each other along the way to bring about those desires. Are we always going to agree? No, of course not! That would be insane to expect that! But as rational adults, we can compromise or back away gracefully from any given scenario, and those hopefully few events that can not be handled with decorum and kindness is where the GM would step in as arbiter. Here is where I'll also note that if something too disagreeable is written? It CAN be edited! I known I am more than willing to change a post of mine if the change better serves the story.
The goal of this story is not to have a bunch of humans killing off and fucking halmon. Heck, that's happening already in this world, and if we wanted to focus on that we could set the story much earlier than several generations in. The goal, as I would see it, is to tell a tale that reaches beyond the characters themselves. Whether that tale is the extermination of the halmon and the subsequent fall of the humans as they deplete their resources, the rise of the halmon to fight back against their oppressors, the return of the elves to establish peace, or the human realization and acceptance of halmon sapience and free will? That will be for us (and our new, beloved GM) to determine as we go along, together.
*blushes and gets down off of the soapbox*