Briefing. Bandits. Village. Bandits. Wolves. You get them everywhere. They lurked in the woods around Kar Brandel, they thrived (throve?) in the inky blackness of Nocturne, and they now prowl the world of the White City, having been sighted from the dreaming peaks of the North to the Breathing Isle beyond the Port of Glass. "But why?" asks the person in the back "are these wolves attacking bunches of heavily armoured adventurers? After all, wolves seldom attack even unarmed people, attacking adventuring parties is clearly madness!"
There are possible answers to this point, some are better than others.
Dude, It's Just A Game
Least satisfying answer first then. Yes, at the end of the day, it is just a game, and we would all do well to bear that in mind. On the other hand something being "a thing" is never an excuse for it not to be as good a "thing" as it can possibly be. Yes, it is only a game, and the fact that the wolves are attacking armed men is but a drop in the ocean of absurdity that encompasses the fact that the "wolves" are a bunch of students going "grr", the "armed men" are just carrying bits of foam rubber and the entire battle periodically gets stopped so that people can walk their dogs through. On the other hand it is a game which relies on suspension of disbelief.
Well... yeah... but fantasy can't be realistic anyway
Just. No.
Repat after me. Accepting one fictional element is not the same as accepting all the stupid bollocks people feel like spouting. Just because there's giants and trolls and troglodites that doesn't mean that things stop making sense.
It's just the way things work on LARPs
We're getting closer now. Not much, but we are getting closer. We have just identified a Genre Convention. The next step is to identify whether it is a Good And Useful genre convention that we should stick to, or a Crap and Stupid genre convention we should eliminate.
LARPs do have to involve fights. Otherwise they may as well just be Freeforms. This is no reason for those fights to be nonsensical, poorly thought through or random. So this argument still doesn't quite hold water until we get a good reason why it makes sense for wolves to be attacking adventurers.
These aren't Real wolves
A refinement, in a sense, of points 1, 2 and 3. The really important thing to remember is that Wolves in the White City are not the same as Wolves in the real world. In the real world wolves are a largely extinct pack hunting animal that kept its self to its self before getting hunted and deforested to death. The wolves in the White City are a different breed altogether.
At its most prosaic level, you can leave it at that. These aren't real wolves, they're White City wolves, they're nastier and they eat people. However if you do leave it at that you are still, in a sense, missing a trick.
I give you due warning. I am about to be pretentious.
We Must Journey into the Underworld Like Prometheus
The really important thing to remember about wolves in the White City isn't just that they are "fantasy versions of wolves that eat people", but rather that they are fairytale wolves, mythical wolves. They are (petentiousness alert! pretentiousness alert!) archetypes and symbols as much as cheap, disposable monsters.
Wolves in the White City attack adventuring parties because they are the silent grey guardians of the forest. They attack adventuring parties because the parties are in dark uncharted woods, full of things that eat people. They are in a place where man was never meant to be, and so the creatures of that place seek to repel them with deadly force.
I know this all sounds like a bunch of pretentious arse, but honestly. Try to bear these sorts of things in mind when constructing adventures and encounters and you will, hopefully, wind up with something that feels far more real, and far closer to what the White City was alwasy supposed to be.