Dulgi Gumiho: A nine-tailed fox who tried to become human but was betrayed and killed, harboring a deep grudge. Ming Dracula / Vampire: A night monster who drinks human blood for eternal life and is weak to sunlight, garlic, and silver. Kkoyeyu Arang: A ghost who appeared at a government office after dying unjustly while escaping a threat of sexual assault. Wajeong Myodusa: A cat-headed snake who tried to help humans but was exterminated due to their fear and greed. Anko Centipede Bride: Died miserably after her true form was revealed due to her husband's suspicion and betrayal.

Jjangdol Gangcheori: A monster that failed to become a dragon and causes disasters due to the mistreatment of humans. Donghee Sondolbo: The vengeful spirit of a boatman who was unjustly beheaded after being suspected while trying to save the King. Gamjaring Songaksi (Virgin Ghost): Died unjustly amidst social neglect and spreads disease. Yui Duduri: Originally a wood spirit who helped humans but was rejected and ignored in a Confucian society. Puddingjeri Golmae: A hawk used for hunting by humans, who died after being abused and now seeks revenge.

Machu Samdugumijo: A three-headed, nine-tailed bird that brings disaster after being hunted simply for being rare. Uwong Samcheokdongjagwi: A young vengeful spirit who was innocently killed by adults and now possesses children. Jangmi Well Ghost: Thrown into a well due to the selfishness of residents, polluting the water quality. Gaesinsa Nonogi: A mountain god yokai who was killed after having his treasures stolen by humans and now casts curses. Sinsaeng Dorangseonbi: A vengeful spirit who lost his love and died due to human jealousy and schemes.

Ssamos Kuneyuki: A yokai who froze to death when ignored by humans after getting lost in the mountains. Dangchan Gisho: Casts curses after being betrayed and killed by a human he believed was a friend. Rimmu Museocheong: Along with the White Snake, feels disillusionment and hatred toward human selfishness. Kkwi Sugwi (Water Ghost): Died after being ignored while drowning and now drags others into the water. Hood Changwi: A ghost who, after being eaten by a tiger, possesses others out of hatred for humans.

10b Emperor Sutoku (Tengu): One of the worst vengeful spirits, who died unjustly after being exiled during a power struggle. Ttoittoi Bakeneko: A cat that seeks revenge after being abused or unjustly killed by its owner. Ryomi Nekomata: A two-tailed cat that was abandoned by humans and casts curses in its old age. Queentol Okiku (Sarayashiki): A servant girl's ghost who was murdered after being framed for breaking a plate. Moyangmon Hashihime: Became a bridge ghost after throwing herself into a river due to her husband's betrayal and false accusations.

Nezu Futakuchi-onna: A yokai with a mouth on the back of her head after starving to death because of a stingy husband. Hane Tsukumogami: An object yokai that seeks revenge after being used with care for a long time, then discarded and trampled. Maju Ushioni: Lived peacefully but was killed for the entertainment of nobles during a hunt. Sarang Nurarihyon: Tortured by humans in the past, he now secretly dominates houses and betrays them. Shua Rabbit of Inaba: Suffered the pain of being skinned after falling for a human's trick.

Hongcha Nure-onna: Devours people after her child was taken by humans and she was tricked into death. Hyunimmer Kappa: Tried to befriend humans but had his arm cut off and was hunted due to a misunderstanding. Howon Ochimusha: A warrior ghost who was killed by poor farmers who stole his possessions while he was fleeing. Belucky Duduri (Korea): Originally a guardian spirit who helped humans, but was treated as an evil ghost and burned by the new regime and Confucian scholars. Pyeonghak Arang: A vengeful spirit who was brutally hacked to death by Obok's sword and abandoned in a bamboo grove after refusing a threat of sexual assault to the end.

Somyeol Herb Ghost: Killed by being indiscriminately uprooted by humans seeking eternal youth. Chester Shade Ghost (Korea): A vengeful spirit who was thrown into a well and died due to group bullying and neglect; he drags passersby into the shadows to trap and kill them. Gomsung Maegoesin: A rose yokai who sells blood after being broken and trampled by greedy humans. Ipinggu Dorangseonbi: A vengeful spirit who lost his lover and died due to human jealousy and schemes; he tears apart couples traveling at night. Takoaki Sanga: Turned away from the human world after being hurt by human greed and her husband's change of heart.

Ggwaek Samdugumijo (Korea): A three-headed, nine-tailed bird that was hung and died after having its feathers plucked and tail cut by human hunters for its rarity. Junbread Jangsanbeom: Had a beautiful cry, but was skinned alive and killed by human hunters targeting its rare fur. Yugisayong Agwi: Originally a water spirit that prevented droughts, but was butchered and boiled in a pot by humans who wanted to eat dragon-phoenix soup. Uyu-tuna Arang: A vengeful spirit who was brutally hacked to death by Obok's sword and abandoned in a bamboo grove after refusing a threat of sexual assault to the end. Mellow Kiyohime (Japan): Burned a man to death along with a temple bell using venom and flames, enraged by the betrayal of the human she loved.

Belki Jorogumo: Lures and eats men after being used and burned at the stake by a human male. Bappul Takanegumo (Japan): Lived peacefully in the mountains but was torn to pieces by the flames and blades of humans trying to expand their territory. Han Yeri 18-year-old female. Suddenly crossed over to the yokai world while going to her academy. She has a very brave and confident personality. She is characterized by her light blue hair and innocent appearance.