Voiced by: Nao Touyama (JP), Emily Neves (EN)
The main heroine of the series.
Aoi is a college sophomore who has the ability to see ayakashi ever since she was a child. She also just so happens to be her grandfather Shiro's collateral for his small debt of one hundred million yen at an inn called Tenjin-ya as a bride to an ogre who runs the establishment.
Determined to pay off the debt on her own rather than marry the guy, Aoi currently runs a small restaurant called Moonflower which serves food from the Apparent Realm tailored to the ayakashi palate.
- Affectionate Nickname: Hatori calls her Missy.
- All-Loving Heroine: Downplayed. Aoi is nice but she doesn't get in the way of other's consequences, such as when she didn't defend Ōryo when the latter attacked her during her trip to Yōto with Ōdanna .
- Arranged Marriage / Accidental Marriage: What jump started her entire adventure in the Hidden Realm in the first place.
- Beast and Beauty: The Beauty to Ōdanna's Beast. Not that he can be considered "ugly" in any sense.
- Blow You Away: Courtesy of the Tengu fan gifted to her by Matsuba.
- Can't Hold His Liquor: During a meal she shared with Ōdanna, Aoi was initially worried to try out the alcohol that came with the meal, thinking that she might be like her grandfather or maybe she would pass out drunk. She subverts it and later enjoys the drink, saying that it tasted more like juice.
- Cute Clumsy Girl: Not always, but Aoi has her moments. She did break down a door or two when she eavesdropped on a conversation between Hatori, Tokihiko and Ōdanna.
- Damsel in Distress: Aoi tends to fall into a lot of trouble. A lot of trouble.
- The Determinator: Aoi will not marry the Ogre God and will pay off that 100,000,000 yen debt by any means necessary. On her own, she would add.
- "Do It Yourself" Theme Tune: Her voice actor, Nao Touyama sings the opening song, Tomoshibi no Manimani.note
- Dude Magnet: Aoi is known to be a rare beauty in the Hidden Realm, and by far she's got almost every single male character wrapped around her finger without having to lift any.
- Easily Forgiven: Sure, Aoi can be a bit petty at times, but really, anyone who's done some kind of cruel thing or mishap towards her is almost always certainly forgiven if she sees they really meant it, save for special mentions.
- Establishing Character Moment: Aoi's first scene shows her independent and practical side and her compassion for yōkai, giving them food when they are hungry as seen when she goes to school from the apartment she lives in alone and when she gives Ōdanna her own lunch on her way to school.
- Fear of Thunder: All of her terrible memories are associated with the dark, the sound of thunder and the flash of lightning. Hearing it causes Aoi to become paralyzed with fear.
- Feminine Women Can Cook: Aoi is the resident supreme chef and has almost all of the qualities of a young girl in a shojō manganote , with the only difference of her being a college sophomore.
- Good Is Not Dumb: The girl has a heart but she can damn tell when things are not as they seem, effortlessly seeing through people and their inner emotions and turmoils.
- Happily Adopted: By her grandfather Shiro after her mother had abandoned her at a young age.
- Important Hair Accessory: The camellia hair pin given to her by Ōdanna. It is made out of rose quartz and resembles that of a real flower by blooming. When the bud does bloom in full, Aoi's time limit to pay the debt will have expired.
- It Runs in the Family: The high spiritual energy, ability to see yŌkai and embed one's spiritual energy into something edible for them was a something Shiro had passed on to his granddaughter.
- Locked Out of the Loop: From the way Shiro's been doing things, it seemed as though he had been planning in secret for the day when he would pass and prepared a place for Aoi to stay for so many years without her knowing, such as lying to her about liking a sweeter, more bland flavor profile when he, like most humans, would have wanted a more savory one.
- Luminescent Blush: Sports one whenever Ōdanna's involved in some intimate moment with her.
- Missing Mom: Of the cruel, voluntary kind.
- My Greatest Failure: To not be able to cook for her grandfather before he died. What makes it even more heartbreaking was knowing that Shiro made it his last will before he passed on.
- Parental Abandonment: Her mother left her in a dark, isolated room without any food or water for days on end, never came back for her and her father is essentially absent throughout her entire childhood. The poor thing's got it hard.
- Plucky Girl: Aoi's nice but she can be pretty stubborn and spirited.
- Raised by Grandparents: After the tragic Parental Abandonment, Shiro takes it as his responsibility to take the young Aoi in and train her how to cook according to ayakashi tastes.
- Screw This, I'm Outta Here!: Her initial reaction to waking up abducted by ayakashi was to break into a run and find a way out of the tatami room. To her shock, she was on the top of a tower overlooking the entire city of Yōto, making her escape impossible.
- Silk Hiding Steel: Just because she's nice doesn't mean won't call you out or she can't roast you into a barbecue for Sunday afternoon lunch. Girl can be pretty vicious, if you know what I mean.
- Strong Family Resemblance: Many, if not the entire cast, have commented on her uncanny resemblance to Shiro, much to her annoyance. Special mention goes to Byakuya who was positively livid at the memory of eating and drinking the inn into the red along with ruining the inn's interiors and the destruction of a relic which was essentially a national treasure, thus ruining Tenjin-ya's finances.
- Supreme Chef: Her cooking is apparently so good that it can actually restore a youkai's spirit energy.
- Through His Stomach: Almost every person she gains as an ally was won over with Aoi's cooking.
- Token Human: In a cast of all kinds of ayakashi, Aoi is the sole human of the group.
- True Blue Femininity: Aoi's default color is in any shade or color with a combination of blue, making her name even more meaningful. note
- Umbrella of Togetherness: Shares a moment with Ōdanna on a trip to the hot springs.
- Working Off the Debt: Insists on doing this rather marry Ōdanna, even once she starts learning his better qualities.
Voiced by: Katsuyuki Konishi (JP), Christopher Wehkamp (EN)An Ogre who runs a prestigious inn in the Hidden Realm called Tenjin-ya. Referred to by others commonly as Ogre God or Master Innkeeper.
Staff describe him as a pretty benevolent boss, despite being cold and merciless at the same time. He and Aoi's grandfather went way back as friends, which made him accept Aoi's hand in marriage when Shiro racked up a debt of 100 million yen.
- A Father to His Men / Benevolent Boss: How the staff of Tenjin-ya feel about him.
- Affectionate Gesture Tothe Head: He's pretty fond of doing this to Aoi as a way of comforting her.
- Badass in Charge: Ōdanna is not only Tenjin-ya's master, but he is also one of the great Hachiyo, the eight leaders who represent the different regions of the Hidden Realm. To say he isn't capable of beating ass would be a grave mistake.
- Chick Magnet: Not surprising, considering he is tall, dark and handsome.
- Cultured Badass: The Master is very knowledgeable when it comes the luxuries of the hotel and service industry, dresses up in wonderfully impeccable fashion, is a darling in elite social circles, an avid traveler who goes out in style (albeit most of those trips are for business purposes), and is undoubtedly one of the most powerful people in the realm. The mere mention of his name makes the Raiju have second thoughts of touching Aoi, even if just for a moment.
- Dark Is Not Evil: Ōdanna sports a dark palette but is actually one of the most just and reasonable people in the entire series.
Voiced by: Shun'ichi Toki (JP), Stephen Fu (EN)A nine-tailed fox ayakashi who was the first to befriend Aoi when she was brought into the Hidden Realm. He is the young master of the inn and has a closer relationship to Ōdanna than the rest of the staff present. He used to run a couple of small businesses in Tenjin-ya's annex building but rarely got customers (or none at all.) He also persuades Aoi to take over the restaurant after trying one of her dishes.
- All of the Other Reindeer: Some of Tenjin-ya's staff dislike Ginji because he used to work at a rival inn.
- Voluntary Shapeshifter: Has a few different alternative modes: fox, child, young man, woman even.