Itzpapalotl

She smiled and she was suddenly young and beautiful like a sudden glimpse of the young woman she must have been once. It was almost more of a shock than the rest. I'd expected a lot of things, but not Itzpapalotl to have retained even a shred of her humanity.
"I am very pleased," she said, and she looked it. I'd pleased the goddess, made her smile. Be still my heart.

(Obsidian Butterfly, page 225, paragraph 5)

* She is about 1000 years old, but Anita can feel her leak power.

* Itzpapalotl is a cruel master vampire who keeps her vampires in check by preventing them to feed. They can only drink blood "like gods" which means, drinking from a cut/sliced earlobe.

* One of her vampires is a short, very Hispanic man, named Cruz.

* About 500 years ago, four of her virgin priestesses were raped and left for nearly dead by twelve Spanish conquerors. One is short and square, another tall and thin, and the remaining two are both delicate. Their skin is lighter than Itzpapalotl's. Itzpapalotl transformed the women, and also turned the men into vampires so that the women could torture them "forever" using weapons called teyolloquanies (leather thongs with silver balls woven into them and attached to a leather handle). Of the original 12, only 2 remain alive: Diego and Cristobal. Until they are dead, the women have taken a vow of silence.

* Itzpapalotl still holds a grudge against the Spaniards even after 500 years.

* Her solid black eyes allow her to see the truth because they can discern anything from an accelerated pulse rate to hidden weapons on a person, because when she touches Anita, Itzpapalotl gives her that power. But, she cannot use it because she deludes herself into thinking she is a goddess and it's obviously not true.

* Anita thinks Itzpapalotl might have been a Aztec sorcerer while alive.

* Her power is warm and smells of exotic flowers. She feeds off the power of others.

* She gave Anita power to entice the Red Woman's Husband and resist his charms in turn.