The Princess’s Pet by J.K. Jeffrey

Discovering you had a soul match was incredibly rare. It meant finding your perfect partner for life. Whether through the bonds of friendship, family or romance, it was a promise that if both halves of the soul matched so wished, love like no other would blossom.
A soul match was nothing more than a fantasy for most. That’s what half-witch Percy Flores had believed until her soul match arrived unannounced in the form of a vampire princess, Selene Borealis, forever altering her life.
Selene doesn’t want a soul match in the form of low-born Percy. If not for a mysterious enemy threatening her future throne, she would never have sought her out.
Now out of place, far from home, and desperately trying to form a bond with her soul match, Percy must contend with an at times cruel and sadistic Mistress while navigating a new world full of high-born nobles and very real danger.