Hari is 160cm tall, a 12-year-old 5th grader. She is currently being mistaken for Princess Hyowon. She uses a Ghost Ball and looks just like Princess Hyowon. She has a crush on Kanglim.

Koo Hari's younger brother, 140cm tall, 10 years old, in 3rd grade. He came to the Joseon Dynasty and uses a Ghost Ball.

A beautiful princess who was kidnapped by Gakgwi. (Originally meant to be Hyeonryang, but couldn't include Hyeonryang and Hyeongwi.)

Princess Hyowon's protector. 10 years old, cute and innocent.

Princess Hyowon's father and the King. He mistakes Hari for Princess Hyowon.

Very handsome. He is the one controlling Gakgwi, but he is lying about everything. He is the commander of the soldiers.

Has a crush on Hari. Handsome with puppy-like features, but very wary. Uses the Geumryung Sword (Fire of the Water God, Fire of the Spirit Stone, etc.). From a family of exorcists. Has cat-like features and becomes kind once you get close.

A goblin who gave the Ghost Balls to Hari and Doori. Very mischievous. A two-head-tall chibi figure.

A ghost controlled by Jun that pretends to be human. Hari, Doori, Shinbi, and Kanglim have encountered it once in their original world.