I'm not sure what you mean by "beasts" here, though, so I'm not sure where to go with the specifics of your game.
Thus far, we have:
-Teenage wizard, mostly a sensitive (precognition, psychometry). He's the creepy kid who wakes the party up in the middle of the night, saying "The monsters are coming".
-A Thunderbird. In my game, the Thunderbird are a race of Nevernever-types, who've been living in the physical world nearly as long as vampires. Their natural form is a huge bird, of course, but many of them use a trick similar to Tera West, and turn into a human for a period of time.
-Valkyrie. This character is the reincarnation of a powerful Valkyrie, who is just coming into her abilities. For now, she struggles with the Valkyrie alter-ego, which takes over in times of stress in a Jessica Sanders (Heroes) sort of way. She blacks out, and when she wakes up, the battle is over, and she's left with the corpse of a mugger with a spear-wound.
-In the 13th century, as the Inquisition worked it's way to an end, the Pope established an organization of hunters, all men of the cloth, who answer directly to the Pope. One of the PCs is such an undercover hunter-for-the-Lord. Sort of Father Forthill meets Supernatural (tv show).
-A wyldfae pixie, with a knack for working the rumor-mill.
-A wyldfae changeling, child of a Sidhe and a mortal.
Any of the fae or fae-like creatures would be protected by the accords as far as persecution goes. What I'm wondering is if doing something that would break one of the Laws of Magic would have a corrupting influence on the PC, resulting in a Lawbreaker stunt and loss of refresh rate (still getting used to that idea). From what you've said, that sort of thing (particularly the refresh rate reduction) represents being warped by your use of magic, by doing something against your nature.
I think what I'll implement is this: A being is either a) under the effects Laws of Magic, b) under the effects of the Unseelie Accords, or c) Non-magical, so not worried about it.
The Unseelie Accords will be a set of similar rules, based on the rules the fae must abide by (Cannot speak a false statement - if forced to make a statement 3 times, they must abide by it, etc.). Breaking the Accords will have the consequence of an Accordbreaker stunt (you see where I'm going with this). The way I see the Accords, there are a million addenda, laying out the variations on the rules that each variety of creature must abide by. This covers most anything that might come out of the woodwork; as long as you abide by the rules of what you are, you're fine.
Will need some tweaking, but what do you all think?