Nam Da-reum

Park Young / Gwi Gong-ja "Young Prince" (pen name)

Na Woo-soo. Doo-shim's classmate and the topper. He is from a rich family. He gets the ability to see ghosts after a small incident and later falls for Doo-shim.

Young Moon Ha-won

Young Han Ji-pyeong

Park Sun-ho

Ryu's true form

Spirit of the Well

Young Chae Do-jin / Yoon Na-moo

Young Ji Soo-ho

Young Lee Soo-yeon

Young Lee Kang-doo

Young Jang Min-jae

Young Jung Jae-chan

Young Wang Won

Kim Soo-bok, the boy who met the Goblin in Paris (Ep. 1, 4)

Park Jung-woo

Yi Do (later King Sejong the Great), Yi Bang-won's third son

Young Yi-seok

Young Dal-po/Ki Ha-myung

Young Tae-kyung

Young Dong-seok

Young Hyeon-seok

Eun Se-kyul, the third eldest son

Young Lee Sung-ha

Kang Min-sung

Na Hwa-sung

Child Gyo-ki

Young Kang-ta

Prince Eunpyeong

Lee Min-jo (Jin-seo's son)

Choi Han-kyul

Child Yoon Ji-hoon

Young Yoon-oh