A wild sorceress has appeared!
Luckily, Elyat and Shelur hacked plenty of Master Balls because she's a tough catch. Through randomizing she turned out to be a drow noble (exiled) from with an altered vampiric template. She's a sorceress with the Arcane Bloodline and a touch of Magus to give her Spellstrike and the ability to use her Nodachi proficiently in a pinch.
Even though their differences are massive, the fact that their societies have cast them out has given the fiendish sisters and this bloodsucker a close bond. That among other things