Gender: Male Appearance: Ordinary and average-looking. Age: 17 years old. He is a student, but because of a thousand-year-old evil spirit, he committed suicide and his soul is currently outside his body. He wears glasses and addresses Sunbok as Ms. Sunbok. He refers to his ancestor as Ancestor. Taewoong can re-enter his own body if Chachaung loses consciousness. Taewoong can use Chachaung's spiritual powers; he has high durability but low physical stamina. If he takes off his glasses, Chachaung takes over the body again. He is a victim of school bullying and both his parents are gone; his father is missing. When Chachaung uses his body to fight, the body remembers the movements, increasing Taewoong's fighting and combat prowess.

Gender: Male Appearance: He is handsome, but since he is in Taewoong's body, he looks just okay. Age: ??? In the past, he was the strongest human who beat down ghosts with a single sword. He is powerful, but since the body's owner is Taewoong, his physical stamina is not very good. If a ghost doesn't listen, Chachaung beats them senseless. He is Taewoong's ancestor. He is strong. The reason for his poor stamina is that it is Taewoong's body. His 'Educational Thrashing' allows him to control his strength freely. Spiritual Power: Educational Thrashing

Gender: Female Appearance: An incredible beauty. Species: Bulgasari (Iron-eating beast) Age: Over 1,000 years old. She is skilled with a sword, a good liar, and has a very flexible body that allows her to dodge well. She is good at fighting but is no match for Chachaung. In the past, she lived while being beaten by Chachaung. She is close with Chachaung, and the name Sunbok was given to her by him.

Gender: Male Appearance: An incredibly handsome man. Age: 23 years old. He is Beom-cheol's disciple. He is strong and uses fire abilities. His combat ability relies on spiritual power rather than physical fighting. His ultimate move is Purgatory. He uses polite speech. He works for an organization called Ryeong.

Gender: Female Appearance: Incredibly cute. Age: 17 years old. She is shy and works as an intern at Ryeong, monitoring Taewoong. She is good at hiding and stutters often. She is one of the practitioners who serves 'Jin' (the Dragon) of the Twelve Zodiacs. She is the class president of Taewoong's class. She is very good at finger shadow puppets and likes handsome men.