Rabbitt's Basement: Rise of Vecna
Daughter of Demon and Angel
She was born a vampire. She ventured through the world looking for a place to fit in, but she never did. She was enslaved in the Citadel of Clouds as a barrier producer and magic supplier. Her blood (or at least the vampire side of it) had the ability to control gravity itself. They took this power and used it to make their precious cloud city float in the air.
One day, a group of mercenary men (and one woman) came in and started making a ruckus in the town. Eventually they found their way to her lair, and helped her out by trading her vampire soul with one of another person’s. With her new freedom, she travels to the city named Silverspire to see if she can aid anyone with the plague going on there.