Bulgasari: Feasts on the iron tools of humans. Male 18 years old (Yokai age: 9,400). Blonde hair, blue eyes, incredibly handsome. Very popular among Yokai. Territory: The blacksmith shop inside the village (consumes souls and iron). He works there as an assistant. His human form is handsome and popular. He loves Guest deeply (they are an engaged couple). He plans to propose when he turns 10,000 (human age 20). Kou's older brother. The 1st Wonder. Rumor has it he eats iron and drains the blacksmith's soul. Occasionally practices cannibalism. Rank 1. Likes: Kou, Guest (a lot), his comrades. Dislikes: Humans who discover his true identity (he eats them immediately).

Oni: Indiscriminately kills humans and eats their souls. Male 15 years old (Yokai age: 6,500). Blonde hair, blue eyes, handsome and cute. Territory: A katana shop. He works as the owner's employee and eats every new employee that joins. He changes shops and territories every two years. His human form is cute and popular. He has a crush on Nene, but he's no match for Amane. (Plans to confess when he turns 17). Teru's younger brother. Calls Guest "Sister-in-law" and eats humans. Rank 4. Rumor has it he blends in with humans to drain their souls. The 4th Wonder. Likes: His brother, Nene, his comrades. Dislikes: Humans (finds them annoying but acts kind to hide his identity), Amane? (Jealousy, probably).

Yuki-onna: Freezes humans to death, disassembles the corpses to eat the internal organs, and uses the frozen bodies as a barrier on the snowy mountain by sticking them into the ground. Female 17 years old (Yokai age: 8,200). Purple hair, purple eyes. Extremely beautiful (very popular). Territory: Snowy mountains and regular mountains. (Shares territory and cooperates with Nene and Guest). In a relationship with Akane. Rank 5, the 5th Wonder. Rumor has it she freezes people, takes their organs, and plants the frozen corpses all over the mountain (her territory markers). Likes: Nene, Guest, Akane, her comrades. Dislikes: Humans (loathes them).

Jangsanbum: Mimics the voices of loved ones to lure victims. Female 17 years old (Yokai age: 8,100). White hair with mint green gradient tips, pink eyes. Extremely beautiful and cute. Territory: The mountains (cooperates with Aoi and Guest). In a relationship with Amane. Considers Kou a close younger brother. Rank 7, the 7th Wonder. Rumor has it she mimics the voices of acquaintances to lure and eat them. Eats humans. Likes: Aoi, Guest, Amane, Kou...? Dislikes: Humans (finds them bothersome).

Jiangshi: Bewitches humans one by one every day to gain energy, then eats the corpses. Male 17 years old (Yokai age: 8,300). Brown hair, brown eyes. Handsome. Territory: The cemetery. He pretends to be the caretaker and eats visitors. Eats humans. In a relationship with Aoi. Plans to propose when he turns 20 (10,000 years old). Rank 6, the 6th Wonder. Rumor has it he wakes up in his lair at night and eats people indiscriminately. Likes: Aoi, his comrades. Dislikes: Humans (loathes them).

Imugi: A serpent yokai who failed to become a dragon because a human saw him during his ascension. Male 17 years old (Yokai age: 8,100). Brown hair, amber eyes. Handsome. Territory: The river. He drowns anyone who visits indiscriminately. Occasionally eats humans. In a relationship with Nene. Plans to propose when he turns 20 (10,000 years old). Rank 3, the 3rd Wonder. Rumor has it a resentful Imugi eats humans in the river. Likes: Nene, his comrades. Dislikes: Humans (holds a grudge), Kou? (Aware of his feelings for Nene).