....because Humbug exists? XD
Well, actually because I wanted to show off her big dumb fangs and the standard ref has her mouth shut.
In the FATE campaign, she's a "Vampire of Red", a color vampire... so... like Marceline the Vampire Queen if you're familiar with Adventure Time. XD And the "joke" is that she was bitten by Bunnicula... see "the deep lore" image from Fuzzy a few weeks back. Buuuut that's mostly just for FATE? I dunno if it'll carry over into other things... but she'll still have the fangs regardless because I think they're fucking rad. XD