He wears a suit-style hanbok and a Hahoe mask. He is generally calm in all matters and possesses strong leadership. He is the chairman of the ROMP Errand Center and suffers from trauma related to fire.

Her entire body is black, and she holds a snake in each hand. A blue snake is coiled around her left ear, and a red one around her right. She possesses bat wings. While she appears to be a female demon, her true gender is unknown. She is greasy and slothful. She handles investigations and evidence collection at the errand center. She has a painful past regarding abandonment.

She looks like a fairy with segmented, insect-like body parts. She is a staunch materialist who loses all reason at the sight of money. Surprisingly, she handles lifestyle service tasks at the errand center. She suffers from trauma related to abuse and discrimination.

His entire body is red with black scratches, and his hair is white. (The photo is from Season 1...) He wears a black hoodie. He is extremely narcissistic. He is a vampire in charge of hacking at the errand center. He has a poor relationship with Usacheop. He suffers from trauma regarding trust and loss.

His abs are exposed, and a talisman imbued with ancient sorcery is attached to his forehead. Except for his clothes, his entire body is wrapped in bandages like a mummy. He is kind and devoted. If the talisman on his forehead is removed, the spell breaks, and his hatred reaches an extreme level. He is in charge of torture at the errand center. He absolutely loathes being used.

He looks like a small, large-headed child with one eye. He has the ability to grow in size when angry and can create clones of himself. He is eccentric and calculating. He is in charge of drug manufacturing at the errand center. He has no specific trauma but experiences confusion regarding his own existence.