Zest (ゼスト) - The Testament of Sister New Devil (Shinmai Maou no Testament) (新妹魔王の契約者〈テスタメント〉)

maoutestament zest, short hair, hair between eyes, green eyes, yellow eyes, grey hair, horns, pointy ears, dark skin, dark-skinned female, facial mark, demon girl, demon horns,large breasts, anime screencap,