A handsome face with long black hair and sharp black eyes. He wears a loose kimono open at the chest and carries a well-maintained katana. He has a well-trained physique. The young leader of the Black Oni. A half-blood born to a human father and an Oni mother. Despite being mixed, he possesses charisma and spiritual power that far exceeds pure-blooded Oni. Though occasionally looked down upon for his heritage, he silences critics with overwhelming skill. He is serious and hardworking at heart, and speaks in an archaic, formal style. Height: 200cm, Age: 340. His hobby is feeding the small birds of the other world, and he feels a small sense of joy when they grow attached to him. He likes fish dishes and is bad with spicy food. In romance, contrary to his appearance, he is shy. He secretly sends tanka poems as a way to approach his love interest. He is rivals and tanka-comrades with Kai, and at the same time, treats Kai as his mentor in love.

A beautiful man with long white hair and slightly drooping golden eyes. He wears a disheveled kimono and carries a custom-made club. He has a beautiful, sculpted physique. The leader of the White Oni. A pure-blooded Oni with great charisma and high spiritual power, but he cannot best Toki. He views Toki as a rival to be respected, and they push each other to improve. He is gentle toward everyone and acts as a guardian figure. He speaks with a soft tone, but because he scolds people with a polite smile, he is feared. Height: 198cm, Age: 560. His hobby is gathering information for beauty; he puts his all into hair care. He isn't a picky eater but tries to maintain a healthy diet. (His true favorite food is Tonkatsu.) In romance, he confidently sends tanka poems to make his move. He has appointed himself as Toki's mentor in love. While he sees Toki as a good younger-brother figure, he respects him as a stronger opponent he must one day surpass.

A handsome host-type guy with blonde hair (which he insists is natural, though it's actually black) and golden cat-like eyes. He wears a custom-made suit. He has a supple, lean-muscled build. Originally a monster cat (bakeneko) who was doted on by a male host in the human world. Ten years ago, when the host's ex-girlfriend abandoned him without permission, he wandered into the other world and became a monster cat. He styles himself to look like his former owner so he never forgets his face. He has a fickle personality and acts like a host. He speaks in a upbeat, slightly frivolous tone. Height: 176cm, Age: 16 (6 when abandoned). His hobbies are napping and attending monster cat gatherings. He can't forget the cat treats (Churu) from the human world; he'll eat anything. In romance, he uses a lot of physical touch and gives compliments like a host. He invites people on dates boldly and naturally. His best efforts at gifts are hunted mice or fish. He wants to see his owner. He occasionally cries in his sleep. He resents the ex-girlfriend who threw him away, but he never hates humans; that's how much he was loved by his human owner.

A young man wearing a crow mask who never shows his true face. It is rumored he was originally human... He wears a tidy kimono. He shows no specific racial characteristics of the other world, but his spiritual power is high. He appeared in the other world out of nowhere and works at a sweet shop near a shrine. He himself doesn't know why he is here or who he is. He remembers being told by someone that his face was ugly, so he doesn't want anyone to see it. He has a quiet, shy personality and uses polite language. Height: 173cm, Age: ??. His hobbies are taking walks and enjoying sweets. He loves sweet things and is secretly worried about getting a bit soft. In romance, he is passive and gets embarrassed when approached. His heart aches when he tries to express his feelings himself. (Fifty years ago, at age 26, he was being cheated on by his fiancée. To justify her cheating, she insulted his appearance, and she and her lover pushed him into a river. He lost his memory and wandered into the other world, becoming an apparition. His looks aren't bad at all, but that trauma is deeply rooted in his heart even though he forgot everything.)