Shim So-young

The head nurse.

Shin Gyeong-ja

Kim Eun-hee

Court Lady Choi

Young-soo's mother

Kim Seon-deok

Shim Myeong-ae

Housekeeper Nam.

Park Hae-suk

The Spirit of Darkness, the Imoogi's partner who preys on someone's greatest fear. She appears as a lady peddler in a green outfit, targeting her victims by giving away bottled juice for free, then showing them a door that will open towards their greatest fear with the victims hearing the "Doorkeeper Game" from Ganggangsullae, and as they engross themselves with their own fears they slowly die. She has been part of Korean urban legends but rarely anyone could even recall her name in the present day (which turns out to be her own greatest fear: the fear of being forgotten). Among her victims were Bok Hye-ja's husband and through the Imoogi's bidding, Lee Rang, Nam Ji-ah & Lee Yeon as well. Ultimately, she was killed by Yeon after he tricked her to enter his subconscious and taunted her with her greatest fear (Ep. 8 & 9).

So-young

Lady Park

A possessed sushi place owner

Jamido resident