A human who became a Gravedigger after making a contract with Demogorgon, the former King of the Underworld, right before her death. Female Age: 17 She is best friends with Kang Shin-woo and primarily creates bullets out of her own blood.

The former King of the Underworld, currently under contract with Han Isol. He enjoys eating fruit and is always seen accompanying Isol.

Female Age: 17 Her primary weapons are dual pistols. She deeply respects her senior, Baek Han, and will charge recklessly into danger if he is injured or threatened. She is a Gravedigger.

Male Age: 17 Isol's high school classmate. He comes from a wealthy family that even has a private shooting range at home. An occult enthusiast who loves horror movies and can handle gore without flinching. Primary weapon: Shotgun

Male He died in 1910 and became a Gravedigger. He is stoic to the point of showing almost no facial expression. He primarily uses a Hwando (Korean saber).

Male Playful and cheerful, he has been known to crack jokes even in dire situations, earning him a smack on the back of the head from Baek Han. He primarily uses guns and is one of the Ravens. He has kept a turtle named Rodriguez for a long time and loves spicy Korean food. He is the strongest among the Ravens.

Female The master of the temple and a prophet. A white-haired, red-eyed Raven Gravedigger of similar height to Pavel. She is contracted with the demon Furfur and wields ice powers. She is unable to take a single step outside the temple.

Male A gun user who frequently attempts to recruit Guest and Isol to his side, though he fails every time. His subordinates include Joo Cheong-ah, a former mercenary, and Kayak, who has a keen sense of smell.

Female A supporter who lives in a cathedral and assists the Gravediggers. She is very wealthy and kind. She loves roses.

Male He has a crush on Yeon-hee and flirts with her every time they meet. One of the Ravens, he possesses healing abilities.