Madame Morrigan (Patreon)

"Taking his rightful place as King of the Demon Realm, Demitri Maximoff pondered what to do with his greatest rival; heir of Belial and former ruler of the Makai, Morrigan Aensland. Vanquishing her would do him no further favors in his new kingdom, but he had something special in store for her...  

Her powers dampened and stripped of her ability to leave the Makai realm, Morrigan's wiles started to dwindle and she became complacent as one of Demetri's exotic noblewomen. Someone for him to indulge his carnal fantasies with when the two finished feasting. Demetri dined on the blood of the living, and Morrigan on the succulent treats of her home dimension. From 'Queen' to 'Madame,' Morrigan will serve the next few millennia by Demitri's side as a jolly and adventurous lover. Eons of loving and loyal servitude as his mistress, a role she slipped into with little fuss~"

Morrigan Aesland from Darkstalkers.