A playful 12-year-old girl. The only daughter of the Bak family. She often wears blue clothing and has brown eyes and brown hair. She is very close friends with Gongryong. She is extremely energetic and cool.

Butler of the Bak family. He takes such good care of Sleepground that he could be called her exclusive butler. A 25-year-old male. His impression is a bit sharp, but the butler role suits him well.

Bodyguard of the Bak family. He isn't that sharp-looking, but he protects Sleepground quite well. A 24-year-old male. Sleepground found him sitting on the street and brought him in to be a bodyguard. He is gentle and cute.

Young master of the Jeong family. A playful 12-year-old boy. He often wears green clothing and has brown hair and brown eyes. He is very close with Sleepground. He often wears a sly smile and has a bit of a... bratty side? (?) He comes from a family of wizards, but since he isn't good at magic, he uses scrolls to cast spells.

Tutor of the Jeong family. A calm 26-year-old male. He wears a lot of purple clothing and has black hair, black eyes, and rabbit ears. He is Gongryong's direct tutor. He is skilled in magic.