- Adaptation Personality Change: Depending on the series, certain characters are either already good despite originally portrayed as antagonistic or started off bad but reformed later on.
- Invisible to Normals: Played with, while in most series yokai are visible to humans, within the sixth anime however, humans are unable to see yokai for the most part. Some cases ignore this, such as the Kappas' revolution and the 808 Tanuki's take over of Japan. In the yokai apartment episode, it is shown that they can make themselves invisible to people, while still being visible to some.
- Long-Lived: Most yokai have rather long lifespans, usually spanning centuries.
- Meaningful Name: Nearly every yokai's name correlates to what they are, what they do, or where they live.
- Punny Name: Occasionally some yokai's names are puns.
- Our Ghosts Are Different: Yurei is a class of yokai, born from deceased humans.
- Paper Talisman: Yokai that are sealed into something have this attached to them.
- Pointy Ears: In the 2018 anime, some yokai that resemble humans are given pointy ears as an indicator of their supernatural nature.
- Race Name Basis: Tends to happen when only an individual of a race, if there are others shown, is the focus. Most prominently are the Yokai of large groups such as Tsurube-Bi, Kijimuna, or Bake-Garasu.
- Sealed Evil in a Can: A large amount of yokai are often sealed within items.
- Single Specimen Species: Zig-Zagged, depending on the yokai and adaptation, there may only be one individual of a species or an entire race of them. Usual aversions are the Kappas, Kitsune, Tanuki, and Tsukumogami.
- Youkai: But of course.
A yokai boy who carries around a plate of tofu.
- Non-Indicative Name: Nickel Kana lampshades this in the 2018 anime, while yes he is a boy with tofu, his name in the literal sense would seem to indicate a yokai made of tofu.
- Overly Long Tongue: Zig-Zagged, while not as long as the likes of Akaname or Tenjo-Name his tongue still sticks out past his chin.
- Reflectionless Useless Eyes: Has this in both the 2007 and 2018 anime.
A small yokai that resembles a cat or dog, that rubs the shins of people.
- Adaptational Badass: Usually depicted as a harmless yokai, the 2018 adaptation gives them the ability to transform into a giant wolf-like version of themself.
- Energy Absorption: Has this power in the 2018 adaptation, where whenever they rub against a person, they siphon a little bit of their energy. Though they have no control over this and was completely unaware that they were causing their loved ones to slowly deteriorate.
- Meaningful Name: Sunekosuri means "shin rubber".
- Tomato in the Mirror: The 2018 anime has Sunekosuri being unaware of their supernatural powers and believed themself to be a normal animal.
A human-like yokai with the ability to stretch her neck.
- Adaptation Dye-Job: Usually depicted with black hair, she has red hair in the 2007 anime.
- Long Neck: Usually appears as a normal woman, she can stretch her neck to an impressive length.
- Meaningful Name: Her name means "stretching neck".
- Promotion to Opening Titles: Following the defeat of Nanashi, Rokuro-Kubi was added to the intro with other ally yokai, waiting (invisibly) in the train station with Mana.
A yokai who licks the filth off of bathroom walls.
- Adaptational Attractiveness: In the original chapter and episode focusing on Akaname, they were depicted with a rather grotesque appearance, having a muddy exterior with occasional flies around them. Later adaptations made them look more petite and generally pretty.
- Adaptation Dye-Job: Has brown hair in the 1985 and 2018 anime, in the 1996 anime their hair is red-violet.
- Ambiguous Gender: Averted for the original chapter and episode where Akaname is depicted as a man. From the 1985 anime and onward Akaname is given an androgynous design.
- Bizarre Taste in Food: Loves to eat grime and other filth off from the bathroom walls.
- Overly Long Tongue: Uses this to eat the filth from bathroom walls.
- Promotion to Opening Titles: In the 2018 anime's opening, starting after episode 50.
Kasa-Bake is a tsukumogami of an umbrella and a reoccurring ally of Kitaro.
A yokai who eats filth off from the ceilings.
Nurikabe's wife and children, they appear in the 2007 anime.
A woman who has no facial features other than a mouth full of black teeth. She owns a bathhouse in the 2007 anime.
- Voice Changeling: In the 2007 anime he can perfectly imitate the voices of others.
A yokai who shouts his name as a way to scare humans.
- Gentle Giant: He's rather tall and means no harm, only calling out to humans as a prank or to warn them of a dangerous threat.
- Good All Along: Kitaro and the others had thought Uwan was the one attacking the humans, in actuality he was scaring them away before Kurobozu would attack them.
- Heroic Sacrifice: Does one at the end of his episode, where he drags Kurobozu into the eternal darkness after a human sees him.
- He Who Must Not Be Seen: What Uwan must be to humans, otherwise he is sent to the eternal darkness.
- Taking You with Me: To save Kitaro the human journalist who wrote about the haunted sites, he reveals himself and drags Kurobozu into the eternal darkness.
- An Ice Person: Being a Yuki-Onna, she has the power to generate small snowstorms.
- Canon Foreigner: Is exclusive to the 2018 anime.
- Human Mom, Non-Human Dad: Inverted, her mother's a Yuki-Onna while her father was human.
- Mystical White Hair: Has long white hair, a normal trait among Yuki-Onna in Kitaro.
- Rapunzel Hair: Her hair reaches down to her waist.
Seven School Mysteries
Mischievous yokai who haunts schools and prank humans.
- Beast with a Human Face: The Jinmenken that roams the connecting corridors is this.
- Living Statue: The weeping statue, the laughing anatomical model and the running Kinjiro Ninomiya statues are these.
- The Piano Player: The picture of Beethoven coming out to play the piano.
- No Historical Figures Were Harmed: Two of the mysterious are this, the portrait of Beethoven and the Kinjiro Ninomiya Statue.
- The Seven Mysteries
- Tears of Blood: The weeping statue that cries blood in the art room.
A yokai haunting the girls' bathroom in Mana's school who is friends with Neko-Musume.
- Cute Ghost Girl: She looks really cute for a haunting ghost.
- Eerie Pale-Skinned Brunette: Fitting since she's a ghost.
- Friendly Ghost: She's friends with the Neko-Musume and the others and doesn't harm the humans of the school she haunts. She also helps evacuate humans during the Nanashi incident.
- Hitodama Light: Has a pair floating around her constantly.
- Perception Filter: Is able to turn herself invisible in front of humans.
- Promotion to Opening Titles: Starting in Episode 50, she along with other Yokai allies to the Kitaro family appears in the intro, invisibly waiting at the train station with Mana.
- Shrinking Violet: She seems kind of shy. When Medama Oyaji calls her cute, she blushes as though she was embarrassed.
Another yokai haunting in Mana's school; stalked Hanako-san before he was defeated by Neko-Musume.
- Because You Were Nice to Me: Fell in love with Hanako-san after she gave him some toilet paper for his Potty Emergency.
- Bishōnen: Noted to be rather handsome by Sunkake-Babaa.
- Crazy Jealous Guy: Kidnapped the other Seven Mysteries because he thought they were also after Hanako-san.
- Curb-Stomp Battle: On the receiving end of this from Neko-Musume.
- Eerie Pale-Skinned Brunette: Like Hanako-san, it suits him since he's a ghost.
- Large Ham: Especially when professing his love for Hanako-san.
- Shown Their Work: Yosuke-kun is an actual urban legend, being a variant of the Hanako-san myth.
- Stalker with a Crush: Stalked Hanako-san because she gave him paper in his "time of need".
Hihi is a baboon yokai.
- Adaptational Nice Guy: The Hihi of legends occasionally prey on humans. In 2018 adaption he does not feed on humans and is rather amicable, if not harsh to those he teaches.
- Curb-Stomp Battle: Despite how ferocious his larger form is, he is easily dispatched by Kitaro with a single hit.
- Jerk with a Heart of Gold: He really is a friendly yokai, his methods are just brutal and he fails to realize they dont always work.
- Killer Gorilla: Hihi can transform into a much larger version of himself when enraged.
- Training from Hell: His training regime with his protege involves a lot of work with very few breaks.
A cyclopic yokai who has an enhanced form of sight and friend of Kagami-Jijii
An elderly tree yōkai who is the guardian of the Hidden Village.
- Beast with a Human Face: Well, a tree with a human face.
- Canon Foreigner: He was made for the 2018 anime.
- Compelling Voice: Uses this to call for children to live in the Hidden Village.
- For Happiness: Wants the children living in the Hidden Village to live happily forever.
- Good Scars, Evil Scars: gains a nasty scar on his face from a Shinigami.
- Well-Intentioned Extremist: calls children into the Hidden Village so they could live forever.
Child-like yōkai who are able to bring good luck to the homes they inhabit.
An elderly yōkai brings poverty to the people he haunts.
- Barefoot Poverty: As a poverty spirit, Binbōgami resembles a vagabond with Messy Hair, dirty clothes, and bare feet.
- Bad Powers, Good People: In the 2018 anime, he brings misfortune to the people he haunts, but does it so to greedy people, hoping to teach them a lesson and become humble.
- Jerkass Has a Point: He's kind of grouchy and brings poverty to the people he haunts, but he points out that money can get over one's head, making them greedy.
- The Jinx: Brings misfortune to those of the home he inhabits.
- Bald of Evil: Barely a few hairs on that scalp, and rather cruel when he wants to be.
- Big Bad Duumvirate: Forms the Great Yokai Alliance with Backbeard in the 2018 adaptation after the latter's resurrection.
- Demolitions Expert: His primary job in his first appearance was bombing train stations and public areas with disguised bombs, all hand made. He was definitely not the type to lose his cool during this, lest he gives his game away.
- The 2007 anime has him use bombs as one of his standard attack tactics.
- His reappearance in the 2018 anime has him bomb a politician's car cause he refuses to accept a bribe.
- Depending on the Writer: How much of a threat he is to the heroes depends on the installment. He can go from merely competent to Laughably Evil to Big Bad material through the decades.
- Driven to Suicide: In the finale of the 2018 anime, after all of his plans are foiled, rather than live in atonement for his actions and for all the humans and yokai killed, he instead takes his own life by blowing himself up.
- Early Installment Weirdness: In his first appearance, Nurarihyon was at best a craftier antagonist that was able to outsmart Kitaro, but ultimately lasted two chapters. Every adaptation since, he's seen as one of Kitaro's biggest adversaries, and one of the most powerful socially and spiritually.
- Evil Old Folks: Even for a Yokai, he's pretty long-lived.
- Greed: He's already rather rich and saved up quite a bit of money, but he's noted to be stingy and crafty to get what he wants.
- Manipulative Bastard: Engineers the confrontation with Neko-Seinen to have many yokai renounce Kitaro and join his own side in the 2018 anime.
- Mr. Smith: His first appearance has his human alias as "Yamada", a rather mundane surname.
- Non-Action Big Bad: Due to his frail appearance, hes more of a schemer than a fighter.
- They Look Like Everyone Else: To most humans, no one expects he's evil because he's so feeble and out of the way.
- Trapped in the Past: His fate in the "Nurarihyon" two-parter, where he and his partner Jakotsu-Babaa are thrown into the time of Mammoths after using a time machine.
A mysterious being with unknown motives.
- Big Bad: Of the first half of the 2018 series.
- Dark Is Evil: Has a dark aura emanating off him.
- Died Happily Ever After: After Mana gives him a name, his spirit passes on to reunite with his mother and father.
- Disc-One Final Boss: For the first half of the 2018 adaptation.
- Element #5: His seals he places on Mana are based on the five elements of Wu Xing: Fire, Wood, Earth, Metal, and Water.
- Fetus Terrible: His actual form is a tiny orb with the mind of a baby.
- Geometric Magic: He can summon yokai with upside-down pentagrams.
- Hidden Agenda Villain: He's frequently lurking in the background and secretly orchestrating some events for unknown purposes.
- Knight of Cerebus: When he appears, the atmosphere turns dark.
- Half-Human Hybrid: Nanashi is the offspring of a human and a yokai.
- Human Mom, Non-Human Dad: His father was a yokai and his mother was a human woman who was a distant ancestor of Mana.
- Long-Lost Relative: He's in fact a very distant relative of Mana on his human mother's side.
- Never Given a Name: Both his parents were killed when he was still in his mother's belly. He doesn't have a proper physical form since he was never given a name. Mana is the one who finally gives him a name, which lets him find peace.
- No Face Under the Mask: His "face" turns out to actually be a mask, with nothing underneath but darkness and a mouth with an Overly Long Tongue.
- Tragic Villain: He's the spirit of a baby that rose from the grave after his human mother and yokai father were killed. Without a name, he didn't had any form to begin with and could only wander through the world hearing the negativity and hatred of everyone around him, which drove him to deciding to destroy it all.
- Woobie, Destroyer of Worlds: His parents were a human and a yokai who were killed because their races condemned their Maligned Mixed Marriage. Nanashi wasn't even allowed to be born and receive a name from his parents, was never given any love and his spirit was corrupted by the negative emotions of both humans and yokai. He turns Mana into a vessel of malice to give himself the form and power to destroy the world. Nezumi Otoko and Mana can understand Nanashi is suffering because neither humans or yokai ever accepted him and thinks the world would be better off without either of them.
A long gel-like yokai, capable of turning people into Vampire Trees.
- Adaptational Backstory Change: In the original manga it was said to not be a yokai at all, but a lifeform from deep underground that evolved completely differently from surface dwellers. Other series went with the simpler explanation of it being a yokai, though the 1996 version pulled a left-field and claimed it was a space alien.
- Adaptational Heroism: The 1996 anime Nobiagari was fused with the will of a man named Toshiyuki Masumoto. He turned the villagers into Vampire Trees in order to protect them from an avalanche.
- Attack Its Weak Point: Kitaro figures that its weak point is its eye in the 2018 anime.
- Baleful Polymorph: It is capable of transforming people and yokai into vampire trees.
- Enfant Terrible: Subverted; Within the 2007 anime, the Nobiagari caused quite the ruckus at Yokai Yokocho, turning nearly everyone into Vampire Trees. Once they stop it, they realize that it was just a baby that was unaware of the troubles it was causing.
- Kill It with Fire: Its weakness in the 1985 and 2007 anime is lava and fire, respectively.
- Required Secondary Powers: Averted. Unfortunately, it is not immune to its own vampire tree seeds, as is the case in the 1968 anime where it is stopped by its seeds when they were planted in it.
- Starter Villain: The first threat that is unleashed that Kitaro faces in the 2018 anime.
- Weakened by the Light: How it dies in the 1996 anime.
A cyclopic yokai, who usually runs his own "school" where he teaches how to be a proper yokai. A reoccurring enemy of Kitaro throughout the series.
- Blow You Away: His main power, where he is able to inhale air to grow larger.
- Cyclops: He has the appearance of a balding Buddhist monk with one big eye.
- Starter Villain: The first threat Kitaro faces in the 1996 anime.
- Weaksauce Weakness: If a human rolls over and chants "Miage-Nyudo, I've seen through you", Miage-Nyudo disappears. Mana got him with this twice. The limitation of a human needing to say this is not needed in the 1996 anime, as Kitaro was able to do this after defeating him.
A giant head yokai, leader of the yokai castle trio.
A yokai woman with a mouth on the back of her head and a pair of snakes as part of her hair, another member of the yokai castle trio.
- Adaptation Dye-Job: Usually portrayed with dark hair colors, such as black (1968 anime), dark blue (1985 & 1996 anime), and violet (2007 anime). However, she has white hair in the 2018 anime.
- Dark Chick: The only female in the group.
- The Hyena: In the 1985 anime, she tends to laugh quite a lot during battle.
- Prehensile Hair: She is able to control her hair snakes to attacks.
- Too Many Mouths: Has a second mouth on the back of her head.
- Would Hurt a Child: Also helped in getting children to use as a sacrifice, going as far as wanting to eat them.
The last member of the yokai castle trio, he can turn his arms into sickles.
- Ascended Extra: Usually restricted to just being a member of the Yokai Castle trio, the 2007 anime gives him the role of becoming a recurring antagonist under Nurarihyon's group.
- Kamaitachi: Instead of the weasel yokai of legend, he looks like a short man with an elongated mouth, similar to an anteater's snout. What he does keep from the legend is the ability to fly around at high speed, often creating whirlwinds that can cut flesh.
- Sinister Scythe: His primary force of offense, being able to turn his hands into sickles.
- Would Hurt a Child: Also helped in getting child sacrifices for their yokai castle. Later he nearly sliced Hiroto's mouth and poke out his eyes, all while having a sadistic sense of pleasure.
- You Don't Look Like You: Kamaitachi are described as being weasels with sickle hands in the original myth, though this one does have sickles he doesnt look even remotely weasel-like.
A faceless yokai.
- Adaptation Dye-Job: Has purple skin in the 1985 anime, normal skin in the 1996 anime, and blue skin in the 2018 anime.
- Adaptational Heroism: Usually portrayed as an antagonist, the 2018 anime has him as a young yokai who wants to protect his friend.
- Age Lift: Normally portrayed with an adult level personality, 2018 anime Nopperabo is relatively young even with his voice.
- The Blank: Has no facial features except for a mouth.
- Face Stealer: He steals people's faces.
- HeelFace Turn: In the 1996 anime, after his defeat against Kitaro.
- I Just Want to Have Friends: In the 2018 anime he had this problem when he was younger, where human children would run away from him because of lack of face.
- Trademark Favorite Food: Soul Tempura, which would normally remove the face of whoever eats it.
A yokai capable of controlling electricity using his drums.
A giant human skeleton yokai, many times larger than most yokai.
- Adaptational Niceguy: Whilst still an antagonist, in the 2007 anime Gasha-Dokuros attack is more justified given humans built a skyscraper over an execution site. Also after being beaten he is a Graceful Loser and even apologizes for his rampage. This is in contrast to both the original myth and his every other appearance where he is a feral and sadistic monster.
- Bad with the Bone: He managed to pull a surprise attack on Kitaro by releasing skeletal arms from his mouth to grab and subsequently eat him in the 2007 anime.
- Dem Bones: Being the Gasha-Dokuro, he is this.
- Eye Beams: Newer adaptations of the series gives it the ability to shoot beams from its left eye.
- Gashadokuro: As in Japanese folklore, Gasha-Dokuro is a giant human skeleton.
A wheel yokai capable of turning people into diamonds.
- Adaptational Heroism: Usually portrayed as an adversary of Kitaro, the 2007 anime makes Wanyudo as a friendly inhabitant of Yokai Yokocho. Later even becoming one of the 47 yokai warriors.
- Cephalothorax: A large human head in the middle of a wheel.
- Taken for Granite: He has the power to turn others into diamonds with his breath, unfortunately, he himself is not immune to this.
A girl who was sacrificed to a river god by her village, she was given the Bell of Dream Control by a priest before she was sacrificed. She now resides in the Dream World as a yokai.
- Brought Down to Badass: After Medama-Oyaji breaks the Bell of Dream Control, she's unable to bring people into the Dream World. She's still a yokai, however, and her smile at the end of her episode implies she has more up her sleeve...
- Canon Foreigner: She is exclusive to the 2018 anime.
- Dream Weaver: With the use of the bell, she could control dreams.
- No Name Given: Is not named In-Universe, but the website lists her as "Dream Bell Girl".
- Prehensile Hair: With the use of the Bell of Dream Control she can make her hair grow long and control it.
- Ride the Rainbow: An additional use of the bell is to create a rainbow bridge that leads to the Dream World.
- Shared Dream: The dream that the girl invited adults into is a country landscape in the summer.
- Slasher Smile: Gives a nasty one after one of the adults she brought into the Dream World declines to stay.
A beautiful human-like yokai, who performs Spiritplastry to change people's faces.
- Affably Evil: Performs spiritplastry on her clients which eventually makes them faceless, though Zunbera gives the client the choice if they really want to go through with the spiritplastry. She is also rather compliant, allowing those who wish to have their original faces back, but not without making them doubt against it, as they had came to her change their faces.
- Gender Flip: Zunbera appears as male in earlier series, but is portrayed as a woman in the 2018 anime.
- It Amused Me: She doesn't charge her clients for her work as she finds their bottomless avarice to be wonderfully precious.
- Rapunzel Hair: Her hair almost reaches her legs.
- Tear Off Your Face: Part of her Spiritplastry involves removing a person's face.
- Was Once Human: Medama-Oyaji has heard rumors that Zunbera was once a human woman, that was so obsessed with beauty that she drank mercury and died to become a Yokai.
Umizatō is a yokai that uses a biwa to control water. He often uses Funa-Yurei as his minions.
- Greed: His motivation in the 2018 anime, where he turned sailors into Funa-Yurei so he could get the treasure from the sunken ships.
- Handicapped Badass: Is blind, but can manipulate water with the use of his biwa.
- Just Following Orders: Tells Kitaro that he was told to kidnap children by Shu-no-Bon.
- Meaningful Name: He's a blind man who lives in the sea.
- Prophet Eyes: Has these in the 2018 anime.
- Sealed Evil in a Can: Was sealed in a jar at the bottom of the seafloor in the 2018 anime.
Ghosts of fishermen who died at sea, often they are the minions of more powerful yokai such as Umizato or Umiosho.
- Aquatic Mook: They serve under yokai who resides around seas.
- Our Ghosts Are Different: Ghosts of people who died at sea. Within the sixth anime, a group of fishermen are instead converted into Funa-Yurei when Umizato steals their souls and are later turned back to normal after their souls had returned.
- Slave Mooks: Usually under the control of a stronger yokai.
A giant crab yokai and a reoccurring enemy of Kitaro.
- Adaptational Nice Guy: The 2018 anime had placed him in a better light than in previous adaptations, him being loyal to a human princess, and he had protected her until he was turned into a rock for centuries. When he returned to his normal form he knew time had passed but forced himself to believe she was still alive and tried to find and protect her.
- Bodyguard Crush: In the 2018 anime, Kani-Bozu was in love with a human princess he had the duty to protect. He, however, was sealed away by an enemy and the princess was killed.
- Giant Enemy Crab: A tremendously large crab who is usually portrayed as enemy to Kitaro.
- HeelFace Turn: In the 1996 anime, after Kani-Bozu's initial defeat he becomes an ally of Kitaro.
- Interspecies Romance: The 2018 anime portrays him in love with a human princess and distraught by his failure to protect her.
- Shapeshifting: Within the 2018 series, Kani-Bozu is able to switch between a human form and a crab form.
- Suicide by Cop: The reason for his attempts to antagonize Kitaro and the whole town in the 2018 anime: he desired to be slain, turned himself into a bronze statue and laid to rest with his beloved princess for the rest of eternity.
- Undying Loyalty: He was fiercely loyal to the princess, to the point that he keeps looking for her even though he must be aware she's long dead.
A giant bovine-like yokai and a reoccurring enemy of Kitaro.
- Adaptational Intelligence: Usually depicted as a mindless beast going on a rampage. The 2007 anime not only gives him the ability to speak coherently, but also has him formulate a plan to get Kitaro's body.
- Body Surf: Switches hosts once his current one has been slain.
- Demonic Possession: His main power, once his current host is slain, he transfers into the body of the one who vanquished him.
- Meaningful Name: Gyuki means "Ox-Demon".
- The Shadow Knows: In the 1996 anime, one of the warnings when someone becomes possessed by the Gyuki is that their shadow resembles it, such as having prominent horns.
- Transformation of the Possessed: Changes his hosts body into that of his own, usually having a grotesque sequence of the person's body changing to match the Gyuki.
A beautiful human-like yokai, married Nezumi-Otoko but left with all the money he had.
- Adaptation Deviation: The 2018 anime avoids her fate of becoming a pet for Umibozu.
- Forced Sleep: Induces this on men through her soothing massages, allowing her to steal whatever they have.
- Gold Digger: Married Nezumi-Otoko so that she could take off with his money, having done so to numerous other men.
- Meet Cute: She and Nezumi-Otoko met right in front of a pawn shop, reaching for an apple she drops.
- Pet the Dog: Although she did steal all the money Nezumi-Otoko had, she did not take the wedding ring he had, which he speculates that she may have really loved him.
- Taken for Granite: Able to turn herself to stone as a defense measure. Even when smashed to pieces she can control her fragments to attack.
A yōkai who wants his victims to commit suicide for them.
- Adaptation Dye-Job: Has red hair and purple skin in the 1996 anime, lime hair and yellow-green skin in the 2007 anime and dark green hair and teal skin in the 2018 anime.
- Madness Mantra: In the 2018 anime he only utters one coherent line.Kubire-Oni: Die for me, Kitarō!
- Murder by Suicide: His goal is normally to manipulate his victims to be Driven to Suicide.
- Prehensile Hair: Has long hair that he uses to tangle people.
A Kitsune who tends to make deals with humans.
- Adaptational Heroism: The 2007 anime has him as a friendly inhabitant of Yokai Yokocho. In the 2018 anime, the sixth Hakusanbo helps Kitaro save Yayoi, who saved him when they were young, risking his life for her.
- Adaptation Dye-Job: Normally depicted as a white furred Kitsune, he is given gold fur in the 1985 anime.
- Deal with the Devil: Makes deals with humans in exchange for whatever he wants.
- Fox Folk: Hakusanbo tends to appear as a fox standing upright wearing a robe.
- Fully Dressed Cartoon Animal: How he normally appears, from the manga up to the 1996 anime, he wears a robe while keeping a mostly fox head, from the 2007 and 2018 anime he wears a men's kimono.
- Interspecies Romance: The sixth Hakusanbo from the 2018 anime marries the girl who nursed him back to health and who he saved from drowning later on.
- Kitsune: Of the variety who makes deals with humans.
- Redeeming Replacement: The sixth Hakusanbo is not a man eater, unlike his predecessor, instead he is an honorable kitsune who only made a deal with a man for the hand of his daughter who saved him years ago. Even risking his life to save her.
- To Serve Man: The fifth Hakusanbo from the 2018 anime was a man eater.
- Voluntary Shapeshifting: In the 1985 anime, he transforms into a number of things in his episode. In the 2018 anime he can also shift between his more anthropomorphic form to a larger fox that stands on all fours.
A yokai who steals and eats corpses.
- Adaptational Heroism: Like Wanyudo, Kasha is normally an adversary of Kitaro. The 2007 anime makes him a friendly inhabitant of Yokai Yokocho, even becoming one of the 47 yokai warriors.
- "Freaky Friday" Flip: Kasha is able to switch bodies with others, though the method changes per series. In the 2018 anime he does so by grasping the hand of the other person.
- Non-Indicative Name: His name means "Fire Cart" and while he does have powers of fire, he doesn't have anything relating to a cart.
- Picky People Eater: In the 2018 anime he prefers corpses spiced with the grief of loved ones.
- To Serve Man: Aside from mochi, he also prefers to eat human corpses.
A snake woman who lives in a swamp.
- Adaptational Backstory Change: In the 2007 anime, she was a woman who tried to find her husband during a war but died.
- Adaptation Dye-Job: Has bright lavender hair in the 2018 anime and dull purple hair in the 2018 anime.
- Literal Man Eater: She was going to eat Shun but was stopped by Kitaro.
- Really 700 Years Old: She's at least 300 years old in the 2018 anime.
- Red Eyes, Take Warning: Has red eyes in both the 2007 and 2018 anime and is dangerous.
- Sealed Evil in a Can: She lives in a well, which is now surrounded by a movie set. She only ever attacks when a film is being produced there, this led to The Production Curse of the film.
- Snake People: Has four snakes consisting her lower half in the 2007 anime, while the 2018 anime has her true form being a giant serpent.
- To Serve Man: Planned on using Nezumi-Otoko's dating app to eat people.
- Villainous Crush: Gains one for Kitaro in the 2018 anime.
- Was Once a Man: Her backstory in the 2007 anime.
A kappa with a plate on his head, has a special song called "Petara Petarako".
- Adaptation Dye-Job: Has red hair in the 1985, 2007 and 2018 anime and green hair in 1996 anime. His body fur in the 1985 anime is red while different shades of green in the 1996, 2007 and 2018 anime.
- Berserk Button: Never. Ever. Steal his song.
- Determinator: Won't stop until the person(s) responsible for stealing his song is captured or worse. He's only held back after Kitaro fights him.
- Eyes Always Shut: Rarely opens his eyes in the 1996 and 2018 anime.
- Glowing Eyes of Doom: In the 2018 anime whenever he opens his eyes, especially when he's about to attack.
- Magic Music: Implied, his song "Petara Petarako" has only three words in its lyrics, yet it becomes very popular to the humans. Played Straight in the 1996 and 2007 anime, where in the latter it can conjure rain and reverse, while in the former it could turn back time.
- Reset Button: In the 1996 anime, his song's last verse turns back time, when sung before humans it goes to the point before they first heard the song.
- Single Specimen Species: Averted in the 2007 anime where an entire tribe is shown, where as he is normally depicted as just one individual.
- Villain Has a Point: He's not in the wrong for wanting to punish the person(s) responsible for stealing his song.
- Weather Manipulation: His song can bring forth rain and undo it in the 2007 anime.
A tsukumogami of a Zori sandal.
- Animate Inanimate Object: Of a straw sandal called a zori.
- Cyclops: Always portrayed with a large circular eye on his face.
- Meaningful Name: Bake-Zori means Monster Zori.
- Red Eyes, Take Warning: Has a red eye in the 2007 anime and planned on manipulating an audience's footwear to attack them.
- Sizeshifter: Is capable of changing his going from a small sandal to a towering giant.
An old man yokai, accuses Kitaro for crimes and prosecutes him for it.
- Decoy Trial: Sets up a trial against Kitaro, but is eventually found out.
- Evil Old Folks
- Nasal Weapon: Is able to use his nose hair to attack, similar to Kitaro's own hair technique.
- Prophet Eyes: Normally has these whenever he opens his eyes. Averted in the 1971 anime where he is shown with pupils.
Mannen-Dake is a giant, long lived bamboo yokai.
- Green Thumb: Can control the bamboo of the forest and can command his army of bamboo people.
- Interspecies Friendship: Became friends with a humans in the 1996 and 2018 anime.
- Meaningful Name: An extremely long lived bamboo.
- Plant Person: Of sorts, he is a giant sentient bamboo stalk that can talk to humans.
- Time Abyss: Has lived over 10,000 years.
- Tragic Villain: Only wants to protect the place where his human friend died.
- Transflormation: Can turn people into his own bamboo people army.
Mujina is a badger yokai whose primary ability is to shapeshift, often works with Oritatami-Nyudo.
- Death by Adaptation: He normally survives his encounter with Kitaro, but in the 2018 anime he is killed by Rei Isurugi, where his soul is used to give him the ability to shapeshift.
- Forced into Evil: In the 2018 anime, he was forced by the Nue to imitate him so he can lead those after him far away from him.
- Hostage Situation: Takes the recently reborn Neko-Musume as a hostage so Kitaro would let him go.
- Just Following Orders: Informs Kitaro that he was (forced) to follow the Nue's orders in the 2018 anime.
- Long-Lost Relative: Uses this to trick Nezumi-Otoko into believing he is his brother.
- Meaningful Name: Japanese for badger.
- Voluntary Shapeshifting: Can transform into anything he desires. Normally used to resemble Nezumi-Otoko to make him believe he is his brother, in the 2018 anime he transforms to act as a proxy for the Nue.
Dorotabo are yokai that dwell in the murky mud of rice paddy fields.
- Adaptational Badass: In the original myth the dorotabo was a small blob of mud that was just really annoying, here though it is depicted as either a horde of mud beings capable of overpowering a town or a colossal mud giant that can easily destroy whole buildings.
- Dishing Out Dirt: Is completely made of mud and is capable of shooting scalding mud from their mouths.
- Self-Duplication: Giant Dorotabo are capable of this once broken down.
- The Unfettered: Completely focused on getting their land back.
- Zerg Rush: When a horde of Dorotabo is formed they are usually able to overpower a town.
A goblin-like yokai.
A spirit of cowardice, she makes her victims cold.
- Adaptational Badass: In the 2018 anime, she's strong enough to freeze an onsen in its average temperature.
- An Ice Person: Can lower the temperature around the victims to cause them to shiver and can cause frost to form.
- Invisibility: Is utterly invisible to people and yokai alike, the only way to see her is by using the Yokai Glasses.
- Sealed Evil in a Can: In the 2018 anime, she was sealed in a scroll and after her defeat she is sealed once more.
Hitokui-Jima is giant living island yokai.
- Genius Loci: A living island.
A giant centipede yokai, who appears in the 1985, 1996 and 2007 anime adaptations.
- Creepy Centipedes: A very large centipede.
Tsuchi-Gumo is a giant spider yokai.
An eight headed serpent.
- Adaptation Dye-Job: Each head has different colors in the 1971 anime, starting from the 1985 anime they all share the same color. It is red in the 1985 anime, pale blue with a green mane in the 1996 anime and is pale green with a purple mane in the 2018 anime.
- Adaptational Intelligence: Normally depicted as a beast chasing after prey within its diamond, or in the 1996 anime following the one who unsealed it. The 2018 anime makes it intelligent to speak and interact with the current holder of its diamond.
- Facial Markings: Has a gold infinity symbol on its main head's forehead in the 1996 anime.
- Jackass Genie: In the 2018 anime it grants the user's wishes, but each time with a deeper twist.
- Multiple Head Case: Has eight heads.
- Orochi: The Yamata-no-Orochi.
- Sealed Evil in a Can: Normally trapped within a diamond. In the 1996 anime, it was sealed as eight different rivers.
A spirit who possesses dead bodies.
- Hoist by His Own Petard: In the 1996 anime, he wanted a body so badly that Kitaro allowed him to take his. However he is dealt with soon after as Kitaro's chanchanko defeats him by engulfing him.
- Possessing a Dead Body: He is able to possess dead bodies and use them as his own.
- Reused Character Design: Moryo shares a number of features with Hihi and Jami, the former with his animated design and the latter in his illustration.
A bird-like yokai who possesses dead bodies.
- Extra Eyes: Normally depicted with three eyes.
- Giant Flyer: Onmoraki is large bird yokai, normally being larger than a human adult.
- Possessing a Dead Body: Possesses a dead body to feed on life energy.
- Sealed Evil in a Can: Tends to be his fate after his defeat, being absorbed into a drawing of himself using the Spirit Paper and Spirit Brush.
Hiderigami is an ape yokai who can bring forth enough heat to cause a drought. Normally wants to draw manga.
- Adaptational Nice Guy: Normally portrayed as an antagonist for his story, the 2007 and 2018 anime have him as a nice yōkai who simply wants to draw manga.
- Adaptation Dye-Job: Has reddish brown fur in the 1985 anime, brown fur in the 1996 anime and orange fur in the 2007 and 2018 anime.
- Brainwashed and Crazy: Happens to him in the 2007 anime, where Zambia places a controller on him.
- Cyclops: Always portrayed with one eye.
- Gender Flip: The hiderigami of folklore are described as being female, however this Hiderigami is male.
- Heat Wave: Can cause this when angered.
- Playing with Fire: Can manipulate heat and flames, where he can assume a giant form made of flames.
- Sequential Artist: Aspires to be one in most versions of his story.
A yōkai who lives in an old camphor tree.
- Elemental Embodiment: The elemental Hoko each embodies and controls one of four elements, Fire, Water, Earth, and Wind.
- Elemental RockPaperScissors: How the elemental Hoko are normally defeated. Works as a Mutual Disadvantage in the 1996 anime where the Fire and Water Hoko and the Earth and Wind Hoko, respectively, are thrown at each other and subsequently disintegrate each other. In the 2018 anime they cannot touch each other, lest they will disintegrate each other as Kitaro figures out.
- Literal Split Personality: After being defeated Hoko will split apartment into four, each representing an element. Averted in the 2018 anime where they are four individual Elemental Hoko.
An old man yokai who has eyes in the palm of his hands.
Four Treasonous Generals
Nue, the chimeric Yokai of legend.
- Adaptational Heroism: In the 2007 anime.
- A Head at Each End: His main head and the snake head at the end of his tail.
- Dark Is Not Evil: In the 2007 anime, he is depicted as a shadowed equine figure but is actually benevolent.
- Mix-and-Match Critters: Being the Nue he is this, having the head of a monkey, the body of a tanuki, the limbs of a tiger and the tail of a snake.
- Nue: The yōkai of legend.
- Dark Is Evil: Is usually depicted with black fur and is portrayed as a villain.
- Kill It with Water: Not his mobile body, but his true body.
- Nice Job Fixing It, Villain!: If he didn't slipped up by mentioning that while water is his weakness, but not for the reason Rei thinks, he would have won.
- Remote Body: In the 2018 anime, his true body is a painting of woman.
- Super Smoke: Can turn himself into a cloud of smoke, using it to travel fast or to attack his prey.
- Tendrils of Darkness: Uses these in the 2018 anime.
An oni, son of the dreadful Shuten-Doji.
- Canon Foreigner: Of sorts, while he is original to the 2018 anime, he is based on Kidomaru, the son of Shuten-Doji in legends.
- Horned Humanoid: Has a green horn with a red tip above his left eye.
- Spirit Advisor: Becomes one to Rei after making a deal with Enma-Daiō, where half of him stay in Jigoku, while the other half is on Earth, mentoring Rei.
- Vengeance Feels Empty: Pretty much tells Rei that even if he does exact his revenge, all he get is this trope.
A nine-tailed fox.
- Adaptational Modesty: She was MUCH more perverse in the manga.
- Light Is Not Good: At full strength Tamamo-no-Mae gives off a bright golden aura, but is still a very evil kitsune.
- Little Bit Beastly: Her human form can occasionally show her tails, even her clones.
- Playing with Fire: She can blast fireballs from her mouth.
- Self-Duplication: Can make several clones of herself, each clone having at least one tail that splits from the main body and holds part of her power.
- Voluntary Shapeshifting: Can assume a human form, when she or her clones return to their fox form they don't leave behind any clothes, making her a Technically Naked Shapeshifter.
The most powerful of all the western yokai, Backbeard is a reoccurring antagonist of Kitaro.
- Arc Villain: Tends to be this at least once every adaptation. Most recently for the Yokai War arc in the 2018 series.
- Back from the Dead: Following his death at the hands of Kitaro near the end of the Yokai War arc, Backbeard's servants attempt to bring him back. Nurarihyon is the one who successfully revives him, forming a Big Bad Duumvirate against Kitaro in the process.
- Big Bad: Of the 2007 series.
- Big Bad Duumvirate: With Nurarihyon in the 2018 adaptation after being revived. Together they form the Great Yokai Alliance.
- Disc-One Final Boss: In the 2018 adaptation. As powerful and clever as he was, even Backbeard was just a pawn in Nanashis plans. Until his resurrection at the hands of Nurarihyon, of course.
- Faceless Eye: Only has a single eye, even when he assumes a humanoid form.
- Hypnotic Eyes: Is capable of using hypnosis in earlier series.
- I Have Your Wife: He gets Agnès to activate the Brigadoon Project by capturing and torturing Kitaro and her sister Adèl.
- Red Eyes, Take Warning: Has red eyes and is the most powerful of the western yokai.
- Oculothorax: Backbeard is always depicted as a single large eye, surrounded by a black mass.
- Take Over the World: In the 2018 series, Backbeard's goal is to turn humans and youkai into his slaves and create his own empire.
Agnès' older sister, the general of Backbeard's army in the 2018 anime.
- Aloof Big Sister: According to Agnès, Adèl was once a caring older sister, but now she doesn't seem to care about anything but keeping the traditions of the witch clan and barely speaks to Agnès. The truth is that Adèl still loved her little sister and the cold way she treated her was all part of an act with the intention of sacrificing herself in order to save Agnès's life.
- Big Sister Instinct: Contrary to everything that she appeared to be, Adèl's real motive the entire time was to protect Agnès from Backbeard, even being willing to give up her life for it.
- Cain and Abel: The Cain to Agnès's Abel. After her sister's betrayal, Adèl remains loyal to Backbeard and his cause. She won't hesitate to fight against Agnès if she gets in Backbeard's way. It's all subverted with the reveal that Adèl was planning to betray Backbeard and sacrifice herself in Agnès's place so her sister would live. After Backbeard is defeated, Adèl and Agnès amend their sisterly bond.
- The Dragon: She's Backbeard's most loyal and trusted follower, being the commander of his army.
- Dragon-in-Chief: While Backbeard is the true leader of the Western Youkai, Adèl is the one who commands his army and gives them orders most of the time.
- Dragon with an Agenda: While pretending to be loyal to Backbeard, she was actually planning to betray him at the moment the Brigadoon Project was about to come into fruition so Agnès wouldn't have to be sacrificed like their mother was. Her plan fails due to lacking the magical power to activate the Brigadoon Project.
- The Fatalist: Unlike her sister, Adèl firmly believes she shouldn't defy her fate of doing Backbeard's bidding. Although, she did secretly plan to betray Backbeard to save Agnès.
- Good All Along: Turns out she wasn't Backbeard's obedient lackey after all, but instead was only pretending in order to protect Agnès. After recovering the Ring of Arcana, instead of forcing Agnès to activate the Brigadoon Project, Adèl tries to make herself into the core and sacrifice herself in Agnès's stead. Her plan fails because she lacks enough magical power, but it still proves Agnès that her sister still loved her.
- Hard Work Hardly Works: Even though she worked hard to master advanced spells, Adèl could never reach the level of magical power Agnès naturally had. Adèl deeply lamented having such a talented sister because she knew Agnès would be selected as a witch sacrifice by Backbeard.
- HeelFace Turn: Has one by the end of the Western Yokai Arc, defecting from Backbeard's army and joins her sister in traveling the world.
- Heroic Sacrifice: Subverted. Adèl intended to give up her life by activating the Brigadoon Project so Agnès wouldn't have to die in the same way as their mother. However, her magical power wasn't enough and Backbeard ended up using Adèl to force Agnès into becoming the core.
- Hot Witch: She's a very attractive witch.
- Military Mage: Wears a military-like outfit and is the shogun of Backbeard's army.
- Missing Mom: Her mother had sacrificed herself when she used the Ring of Arcana for Backbeard.
- Mutual Envy: Agnès feels like a failure compared to Adèl, who is a better learner and more skilled at magic than her. Meanwhile, Adél is secretly jealous of Agnès because of her immense magic power, which even caught the attention of Backbeard. The truth is Adèl wasn't jealous of Agnès's potential as a witch, but wished she had had Agnès's power level so she would have been selected as the witch sacrifice for the Brigadoon Project instead.
- Mystical White Hair: She's a witch with long white hair.
- Onee-sama: She once was Adèl's dear and admired older sister, but they're not on speaking terms anymore. After Adèl reveals her true intentions to protect her sister, Agnès acknowledges her as her beloved sister once more.
- Pointy Ears: Same as her sister, Adèl has slightly pointy ears.
- Power Gives You Wings: Unlike her sister, she can make a pair of green, geometrical-shaped wings with the use of her magic stones.
- Rapunzel Hair: Her hair is longer than her body, but she ties it up to make it look shorter.
- Red Eyes, Take Warning: She has red eyes and unlike her sister, she's a villain.
- Technicolor Eyes: Her irises are red and her pupils are purple.
- Walking the Earth: After Backbeard's defeat and her reconciliation with Agnès, the two sister go on a journey around the world to enjoy their new freedom.
- Weak, but Skilled: Has less magical power than her sister, but is said to know more spells than her.
- Well-Intentioned Extremist: Actually isnt a willing servant of Backbeard and is trying to manipulate events to protect her sister.
- White Hair, Black Heart: She has white hair and acts as a major antagonist in the Backbeard arc of the 2018 anime. Subverted as she was Good All Along.
- Witch Species: Like her sister, Adèl is part of the Western youkai race of witches, although her magic isn't as powerful as her mother's and sister's.
- Zero-Approval Gambit: Her cold, traditionalist witch character was an elaborate act in her plot to betray Backbeard and sacrifice herself for Agnès's sake. In reality, Adèl was still the same loving, kind-hearted sister Agnès remembered.
The werewolf of Backbeard's army in the 2018 anime.
- Animal Jingoism: He seems to hate Neko-Musume as much as Neko-Musume hates-Nezumi Otoko, as a werewolf is still partly a male dog, and a Neko-Musume is still partly a female cat.
- The Brute: He's the most prominent physical fighter of the Backbeard Army.
- Cruel and Unusual Death: Drinks Spiked Blood and gets absorbed into Blackbeard in an attempt to stop the pain. His soul is last seen floating high in the sky after Kitaro defeats Backbeard once more.
- Faux Affably Evil: Wolfgang acts as a cultured, elegant businessman more than willing to compromise with Agnès, asking her politely to come back home, gallant with Adèl, obedient to Backbeard: but when angered, refused or facing adversaries perceived as lesser than him, he becomes a cruel, elitist and and outright racist Blood Knight willing to torture, kill and maim.
- Our Werewolves Are Different: Is capable of turning into his werewolf form at will, even if the moon is not out. Additionally his weakness to silver bullets is ignored and claims that he becomes invincible under a full moon.
- Subverted in the fact silver did affect him first time he appeared in the 2018 anime, however in his second appearance, since it was a full moon, he was able to no-sell the bullets.
- Werewolf Theme Naming: His name is Wolfgang.
- Worf Effect: Both inflicts this and is later on the receiving end: his debut shows how dangerous the Western yokai can be, but then is later beaten up to show how stronger the Japanese yokai have become.
The frankenstein of Backbeard's army in the 2018 anime.
- Creepy Child: Is rather unsettling.
- Cruel and Unusual Death: Drinks Spiked Blood and gets absorbed into Blackbeard in an attempt to stop the pain. His soul is last seen floating high in the sky after Kitaro defeats Backbeard once more.
- Dr. Fakenstein: Unlike previous series, this Frankenstein is the doctor and the monster.
- Evil Genius: He's the Backbeard's Army top scientist.
- Expy: Of the Incredible Hulk, nonetheless. A wimpy, unsettling scientist that, if pressured to rage and fear, turns into a hulking brute of dim intelligence bent to remove any source of distress.
- Hulking Out: In Agnès' words, when Victor Frankestein is threatened to the point of crying for his life, the True Victor Frankenstein comes forth.
- Labcoat of Science and Medicine: He wears a labcoat that is tattered by the tail, hence his Mad Scientist motif.
- Love at First Sight: He's instantly smitten by Mana when he sees her.
- Mad Scientist: He has the stereotypical personality of a crazy, evil scientist and creates artificial monsters in his laboratory.
- Mark of the Supernatural: His left eye's iris is green with a yellow pupil in the center, while his right eye's iris is purple with a small yellow pupil. This is because he's a monster made from several corpses.
- Perpetual Smiler: Has a constant smirk on his face.
- Scary Stitches: Has numerous stitches across his body.
- Teen Genius: As the scientist of Backbeard's army, he is incredibly intelligent, being able to create a large beast and has numerous gadgets, all while having the appearance of a child.
- Villainous Crush: Right from the moment he sees Mana, he decides he wants to make her his bride and tries to "kiss" her with a gross hand mouth.
The vampire of Backbeard's army in the 2018 anime.
- Blood Bath: At one point she is seen bathing in a pool of blood, though it is unknown if it supports her powers or not.
- Cleavage Window: Carmilla's outfit has one.
- Cruel and Unusual Death: Drinks Spiked Blood and gets absorbed into Blackbeard in an attempt to stop the pain. His soul is last seen floating high in the sky after Kitaro defeats Backbeard once more.
- The Dark Chick: Plays this role in Backbeard's Army, being the attractive, seductive villainess of the group.
- Eerie Pale-Skinned Brunette: Fittingly for a vampire, Carmilla has pale white skin and long black, wavy hair.
- Evil Is Sexy: A tall and well-endowed vampire who is constantly wearing form-fitting clothing.
- Fangs Are Evil: She has a pair of fangs that aren't really noticeable, well unless she is about to bite.
- Femme Fatalons: A vampire lady with long red nails.
- Lesbian Vampire: Similar to her namesake, Carmilla seemed to only be interested in turning young women into vampires, and from what she says about Neko-Musume during her battle with her, where she plans on putting "a pretty collar" on her and keeping her as a pet, is any indication.
- Meaningful Name: Named after the eponymous Lesbian Vampire of the novel Carmilla.
- One to Million to One: She's capable of turning into a swarm of bats, with one keeping her speech and intelligence.
- Our Vampires Are Different: Can turn into a swarm of bats, she can also survive from a strike through her heart by transforming into a bat after her body crumbles.
- Pointy Ears: Her ears are pointy to show her status as a vampire.
- Red Eyes, Take Warning: Carmilla has red eyes and uses them to put her victim in a trance before biting their neck.
- Sadist: Right before expressing her wish to collar and enslave Neko-Musume, she seems to find really pleasurable the idea of beating her up.
A young witch who betrayed the Western Youkai. She stole the Ring of Arcana and fled Backbeard's castle, ending up in Japan. She asks the Kitaro family to help her stop Backbeard's Brigadoon Project, although Agnès's personality makes cooperation difficult.
- Aloof Ally: She asks for the Kitaro Family's help in stopping Backbeard's army and their Brigadoon Project, but she's extremely distant and reluctant to cooperate as part of a team. Thanks to befriending Mana and Kitaro, she grows to care about her allies and starts to open up more.
- Animate Inanimate Object: Her broomstick has a mind of its own and acts much like a dog.
- Apocalypse Maiden: Backbeard plans to use Agnès as the core of the Brigadoon Project, which will turn humans into youkai and then turn all youkai into Backbeard's mindless slaves. Agnès wants to take no part on such a plan, but finally agrees to become the core to protect Kitaro and Adèl.
- Because You Were Nice to Me: Mana is the first person to befriend Agnès since her arrival to Japan, causing Agnès to treasure her a lot.
- Blessed with Suck: Ever since she was a little girl, Agnès had immense magical power that gave her the potential to become a great witch. Unfortunately, Backbeard intended to use Agnès's power for his own gain.
- Broken Bird: She lost her mother to Backbeard, her sister is a powerhungry witch serving the Big Bad and wishing to grant him control over humanity and ghouldom. Is that much a surprise that she has huge trust issues, fears to be abandoned to the point of refusing human contact and she acts recklessly suicidal?
- Cain and Abel: The Abel to Adèl's Cain. Agnès left the Western Youkai to stop Backbeard's Evil Plan, but her sister Adèle stays loyal to Backbeard. After Adèl reveals she loved her sister all along and Backbeard is defeated, they reconcile.
- The Chosen One: Since she was a child, Backbeard chose her to eventually become the cornerstone for his Brigadoon Project.
- Cute Witch: Agnès is a witch with the appearance of a cute teenage girl, wears a wizard hat, travels in a Flying Broomstick (which is sentient by the way) and can cast magic spells.
- Defector from Decadence: She deserted Backbeard's side because she couldn't approve of the destruction the Brigadoon Plan would cause.
- Defrosting Ice Queen: She starts off as cold, unfriendly and indifferent towards the Japanese youkai, only caring about stopping Backbeard at all costs. After befriending Mana and becoming closer to the Kitaro Family, Agnès opens up a lot and doesn't want to see them in danger because of her.
- Flying Broomstick: Owns a flying broomstick, oddly enough it has a dog-like sentience.
- Hair of Gold, Heart of Gold: She's a blonde and despite coming off as unfriendly at first, Agnès is a young witch with a good heart.
- Jerk with a Heart of Gold: Agnès is a good person and really wants to stop her fellow Western youkai from doing bad things, but she's also self-centered, antisocial and inconsiderate to others' feelings. After realizing she was being very rude to the Japanese youkai, Agnès improves her attitude and becomes friendlier in general.
- Missing Mom: Her mother had sacrificed herself when she used the Ring of Arcana for Backbeard.
- Playing with Fire: Her primary offensive form of magic.
- Pointy Ears: Her ears are a bit pointy.
- Rapunzel Hair: Her hair reaches her waist.
- Screw Destiny: Her reason for betraying Backbeard is that she wants to be the master of her own fate instead of being nothing but Backbeard's pawn.
- Sugar-and-Ice Personality: She may appear cold and aloof, but she's a really kind and caring person once Mana befriends her.
- Supernatural Is Purple: Her eyes are mostly purple, an indication that she's a witch.
- Technicolor Eyes: Her irises are mostly violet, turning yellow at the bottom and her pupils are orange.
- Took a Level in Kindness: She becomes less cold and much nicer thanks to her interactions with Mana.
- Unskilledbut Strong: She has a high amount of raw magical power, but has troubles casting the spells properly.
- Walking the Earth: After Backbeard is defeated by Kitaro, Agnès departs to travel around the world along her sister Adèl.
- Well-Intentioned Extremist: She really means well by insisting to destroy the Ring of Arcana before the Western youkai get their hands on it. However, she's in such a hurry that she actually puts Kitaro's life in danger to give him a power boost so he could destroy the ring faster.
- Witch Species: As a witch, Agnès is part of a Western youkai race and magical power runs in her family. Unfortunately, the witch clan is doomed to be used as sacrifices for Backbeard's Evil Plan, a fate Agnès is determinate to fight off.
A vampire guitarist who lures his prey with his beautiful serenade.
- Even Evil Has Loved Ones: He is given a sister in the 1996 anime, a vampire bat named Tina. He loves his sister dearly, so much so that his goal was to turn her into a vampire as well.
- Kill It with Fire: Several adaptations depict his death this way, usually burning within a building.
- Mind-Control Music: Using his guitar he can mind-control anyone he wishes.
- Only Known by Their Nickname: Subverted. He is usually known as Vampire Elite, however his real name is Johnny.
- Spared by the Adaptation: In the 1996 anime, he survives the fire but is reduced back to his vampire bat form.
A noble vampire who is accompanied by a human named Mammoth.
- Adaptation Dye-Job: Normally depicted with dark hair (presumably black), the 2018 anime makes him a blond.
- Age Lift: Is a child in the 2018 anime.
- Black Eyes of Evil: The 2018 anime gives him black sclerae and he is very dangerous.
- Dies Differently in Adaptation: In the 2018 anime, where he and Mammoth managed to escape the burning room, he is finished off by Rei using the fire from the cabin with the use of a fire yokai's power.
- Kill It with Fire: Is killed by fire in all adaptations he appears in. Even in his appearance in the 2018 anime, where he escapes the burning cabin, he's quickly finished off by Rei using the powers of a fire yokai.
- You Don't Look Like You: His appearance in the 2018 anime is drastically different, looking like a child with wild messy blonde hair instead of his usual elegant adult appearance.
A giant floating head yokai from China, normally serves under Qi. Can assume a human form from the 2007 anime onward.
- Adaptation Dye-Job: Has blonde hair in the 1985 anime, purple hair in the 2007 anime and light blue hair in the 2018 anime.
- Ambiguous Gender: In the 1985 anime, because they didn't assume a human form it's unknown whether they were male or female.
- Anime Chinese Girl: Took this as her human form in the 2007 anime.
- Beauty Equals Goodness: Averted in the 2018 anime, Gahi at first appear to be this being a nice handsome man who has a girl named Yuna falling into a relationship with him, but his true colors show by the end.
- Evil Is Sexy: Both the 2007 and the 2018 anime Gahi uses their human form to seduce people:
- The former doing so to the South Asian Five to aid her in defeating Kitaro.
- The latter to Yuna into helping him collect people for him to eat their souls.
- Flying Face: The true form of Gahi is a a giant floating head with long flowing hair and a mouth blocked by its large tongue.
- Gender Flip: A female in the 2007 anime, while a male in the 2018 anime.
- Light Is Not Good: The Gahi from the 2018 anime has light blue hair and wears a white Changshan but tricks a girl into helping him consume human souls.
- Long-Haired Pretty Boy: In the 2018 anime, Gahi's human form resembles this.
- Pointy Ears: Has these in the 2018 anime to indicate he's a yokai.
- Red Eyes, Take Warning: Gahi has red eyes in both his true and human forms and planned on consuming the souls of humans.
- Sealed Evil in a Can: In the 2018 anime, Gahi was sealed within a scroll kept by Sunakake-Babaa.
- Soul Eating: In the 2018 anime at least.
A yokai guitarist who uses his beautiful serenades to lure victims.
- Adaptation Dye-Job: Depicted with light-colored hair in the manga and 1968 anime, navy in the 1985 anime, blue in the 1996 anime, green in the 2007 and Hakaba anime and white hair in the 2018 anime.
- Bad Santa: In the 2018 anime he possesses people wearing Santa costumes to lure children so he could drain their life force.
- Black Eyes of Evil: Has black sclerae in the 2007 anime. Not him per se in the 2018 anime, but his hosts gain completely black eyes.
- Kill It with Fire: Is killed this way in the 1968 anime.
- Mind-Control Music: In the 2007 anime, he was able to mind control an entire crowd into becoming his minions.
- Puppeteer Parasite: The 2018 anime gives him more control over his human host unlike past series.
- Prehensile Hair: Being made out of hair he is able to entangle his target with his own body.
- Red Eyes, Take Warning: His eyes glow red in the 2018 anime.
- Soul Eating: His usual modus operandi.
- Would Hurt a Child: His victims in the 1996 and 2018 anime all consists of young children.
Other Foreign Yokai
A vampire couple from South Asia.
Tropes that apply to them in general
- Daywalking Vampire: The two are normally unaffected by daylight.
- Our Vampires Are Different: While Monroe looks relatively human, Pii on the hand is a chimercal being.
- Ugly Guy, Hot Wife: Pii is a strange chimerical being, while Monroe is beautiful woman.
Tropes that apply only to Pii
- Adaptation Dye-Job: He is green in the 1971, (where he has a teal face) 2007 and 2018 anime, purple in the 1985 and 1996 anime, albeit with a green face for the latter. Meanwhile his mane is green in the 1971 anime, dark blue in the 1985 anime and yellow in the 1996, 2007 and 2018 anime.
- Mix-and-Match Critters: Pii has a long reptilian body, bird feet, a mane and a human hand.
- Nice Hat: Wears a top hat. Crosses with Hat of Power in the 1971 and 2018 anime can turn those who wear it into vampires, and in the latter, it is made of the blood of his ancestors.
- Weak, but Skilled: In the 2018 anime, he is said to not be that strong, however the minions he make are rather dangerous.
Tropes that apply only to Monroe
- Adaptational Attractiveness: With each anime adaptation she becomes prettier than the last.
- Adaptational Badass: Normally she just stays by Pii's side and manages to take Kitaro to Pii. In the 2007 anime, she's able to grow her nails into claws to fight against Neko-Musume.
- Beauty Mark: Has one on her left cheek, just like her namesake.
- Beethoven Was an Alien Spy: Monroe being a vampire would count.
- Evil Is Sexy: Uses her beauty to charm people.
- Everyone Loves Blondes: A number of people fall for her, Nezumi-Otoko is a common.
- Even the Girls Want Her: Several women are also charmed by her in the 2007 anime.
- Femme Fatalons: Has this in the 2007 anime.
- Hair of Gold, Heart of Gold: Subverted. She has blonde hair but works with Pii to start a vampire horde.
- Light Is Not Good: Wears a white dress in the 1985 and 2018 anime, but still causes trouble along with Pii.
- Supernatural Is Purple: Starting from the 2007 anime, Monroe is given purple eyes, to indicate that she's a yokai.