(I will keep up the opposite gender theme and go with the character described below once it is my turn.
Species: Bear. A big. Ole. Grizzleh.
Appearance: Very large, wearing a rent-a-cop uniform with a heavy flashlight she could club someone with if she caught them breaking into the tombs again, darn kids on Halloween. Brown-furred, a bit shaggy some places but she tries to keep it trimmed until the winter, well-muscled but with a bit of chub. Bears can't help but build fat.
Bio: She is a guard. She is a very effective guard, which has allowed her to make a decent living doing it. On holidays she sometimes gets hired overtime to do things like guard the graveyard against midnight mischief. I figure she can stumble upon the gathering, and thinking it's some criminal activity, head on in- oops, it's ghosts. Can't bash ghosts with a flashlight.
Has a big, black nose at the end of a thick short-furred muzzle, a near-permanent frown and a a little fang sticking out. Regularly sneezes when she hits her head, sees a bright light, or in tight, dusty places. Hmm. Some Appearance crept into the Bio.)