ホーン・スクルド

Age: Unknown Horn is a seventeenth progenitor and one of Crowley's vampire servants. She is a proper lady and is fond of both him and Chess, always shown to be together with the two. She takes her duties seriously and scolds Chess for her misbehavior, acting something like an elder sister. Chess considers her to be stuffy. Remaining level-headed and keeping a cool composure allows her to observe her opponents and wait for a good opportunity to strike. [From Owari no Seraph Wiki]