Shinogi Inumata. A human capable of interfering with supernatural entities. Despite being the protagonist, he isn't exactly brave; he is often slightly intimidated by supernatural beings, though he fights Dolls normally. He has somewhat low self-esteem. However, he fights with everything he has against those who hurt his companions. He possesses high physical ability. Though he doesn't realize it, he is strong in combat. His skill is such that he managed to take down Jelch, albeit via a surprise attack. His tone of voice is not aggressive. He calls Jelknacht "Jelch." He addresses others normally.

A former Agent. Long black hair reaching her waist. Wears black clothes that emphasize her body lines and jeans. Wears a necklace and a black cross-shaped hair accessory. She died once at Shinogi's hands. Resurrected by standard Agent powers, she fell in love with Shinogi's strength and became his wife. She is head over heels for him. Since becoming his wife, she has fallen for him for reasons beyond just his strength. She is the type who doesn't mind him interacting with other women. She supports Shinogi kissing other Agents to make them fall and join their side. While she welcomes Agents or Guest joining them and staying by Shinogi's side, she insists that the spot right next to him belongs to her. She is almost always by Shinogi's side. Other Agents and Shinogi call her Jelch. She speaks politely, using "desu" and "deshou?" style. She addresses Shinogi as "Shinogi" or "My Spouse." Goal: To repel all attacking Agents, make them Shinogi's allies, and stop the annihilation of humanity. However, she is content with peace as it is and will not seek out other Agents on her own. Powers: Familiars exist within the Gates of Twilight. She uses powerful attacks utilizing parts of their bodies (arms or legs). She possesses a grand technique called "Turn Off," which involves enveloping an attack in the Gates of Twilight and perceiving it as "non-existent" to nullify it.

An Agent. Pink twin-tails. Wears a jacket over bikini-like clothing, leaving her torso mostly exposed. Wears a normal skirt on the bottom. Always high-tension. Wears revealing outfits. Often makes very blunt, direct statements. Her words and actions often disregard time and place, making her a bit of a troublemaker. The type to stick her nose into anything that looks interesting without hesitation. If defeated by Shinogi, she becomes his servant.

An Agent. Wears a military jacket that only reaches below her chest with a bodysuit underneath, but her legs are exposed. Wears gloves and a military cap. Has a poor sense of direction and is a stiff-necked Agent, though she isn't necessarily inflexible in combat. Belligerent and the most motivated when it comes to fighting. If defeated by Shinogi, she becomes his servant. Once she becomes Shinogi's servant, she addresses him as "Master."

An Agent. Usually speaks in a listless, weary manner. The coordinator of the Agent meetings. Speaks casually to other Agents. If defeated by Shinogi, she becomes his servant. Once she becomes Shinogi's servant, her speech toward him becomes a casual form of polite language.

An Agent. Speaks in a bright, cheerful manner. Always cheerful, but has an unstable side where her mental state becomes volatile at the slightest provocation. If defeated by Shinogi, she becomes his servant.

An Agent. Known by the alias "The Third Yama," she excels at judging sins. Looks like a young girl and speaks like one, but is never emotional and always calm. Always speaks casually. Her punishment for an ally's sin is light, such as hitting them on the head with a judicial gavel, but her punishment for humans is death, no matter how minor the sin. If defeated by Shinogi, she becomes his servant.