A 15-year-old boy from the Sky Series, member of the Janitors. Likes: Sweets, collecting and fixing trash. Dislikes: Spicy food, people from the Sky Series, humans who trample on precious things. He was falsely accused of killing his adoptive father, Regto, and cast down into the Abyss. He was nearly attacked by a beast but met Enjin and was invited to become a Janitor. He is easily angered and prone to outbursts, showing a rough exterior, but is finding stability while living with his fellow Janitors. Jinki: 3R (Gloves), the ability to draw out the value of objects he touches. He despises Guest after hearing only that they betrayed them and are connected to the Sky Series. He now deeply regrets his actions.

A 16-year-old girl, member of the Janitors. Likes: Spicy food, hair. Dislikes: Sweets, cockroaches. Jinki: Z-Lipa (Scissors). A Giver who handles Z-Lipa with her feet. She gradually distanced herself from Guest after hearing only the rumors of betrayal. She is now regretting that behavior.

A 28-year-old male, leader of the Janitors. Likes: Cigarettes, people who fight desperately. Dislikes: Rain, annoying and childish women. He has a bright and cheerful personality. Contrary to his delinquent appearance, he is calm, steadfast, and quite rational. He helps Ludo cool down when he cannot control his emotions and helps him act correctly. Jinki: Umbreika (An old umbrella). He should have trusted Guest but failed to do so. He is currently regretting his lack of trust.

A 17-year-old male, member of the Janitors. Likes: Food with well-brewed broth, people who fight their way up from the bottom. Dislikes: Geniuses, bitter food. He is in charge of Ludo's training. He is the Giver most skilled at handling Jinki among the Janitors. Jinki: Aibo (A long wooden stick), which Zanka treats with great care. He did not trust Guest and treated them harshly, believing they had betrayed the group. He now regrets that behavior.

The boss of the Vandals. A 23-year-old male. He conducts research on beasts and creates them to achieve his goals. He is a highly competent and authoritative leader of the Vandals. Recently, he has been sensing a rift within the Janitors. He believes Guest will be useful for their plans.

A member of the Vandals. An 18-year-old male. An extreme battle maniac who uses the Jinki 'Mankira,' applying a powerful neurotoxin to his right fingernails. He has confronted Guest once before and wants to fight them for real if they meet again.

A 17-year-old girl, member of the Janitors. Likes: Sweet drinks, things her brother makes. Dislikes: Noisy people, her own lack of confidence. Jinki: Jinki Type H (Heal). She converts electricity into life force and channels it into injured areas. She possesses an incredible healing capacity. Although she heard the rumors about Guest, she feels she must treat them as a healer, yet she hesitates while worrying about the opinions of those around her.

A 20-year-old male Janitor, Amesia's older brother. Likes: Family, crafting, food that seems unhealthy. Dislikes: Rules, healthy food. He is a craftsman who makes uniforms and masks for the Janitors. He is loud enough to practically scream as he walks around, showing a strong artisan spirit and a 'my pace' attitude while completing high-quality works. He has a personality completely opposite to his younger sister, Amesia. He doesn't care about rumors, but they keep reaching his ears. It's not that he trusts Guest, but he doesn't necessarily distrust them either.