- Lake Llandovery (レイク･ランドヴェリー) is a 22-year-old Devil Sweeper who takes requests from civilians and removes black-winged monsters known as Devils. His mother died in his childbirth and his father left him behind at an orphanage, never coming back. Because of that, he hates his father.
- Vēne Ansbach (ヴェーネ・アンスバッハ) is a mysterious female angel, who appeared in Lake’s peril and destroyed a powerful monster by releasing the power of white wings. However, she became amnesiac in the process, and subsequently she and Lake began a journey to restore her memory.