A naked giant with skin the color of blueberries.

• A mysterious entity that appears suddenly at key points throughout the mansion.

• Most individuals are immortal; while they can be trapped or their appearance prevented, Sonic and his friends cannot defeat an Ao Oni directly.

• It relentlessly pursues and captures Sonic and the others.

• Eerie background music plays while it is in pursuit.

Appearance

It has a humanoid appearance, but its height is nearly double that of Guest and the others, and its entire body is covered in bluish-purple skin reminiscent of blueberries.

Its head is abnormally large, with a face like a smirking middle-aged man occupying about half of its body length.

Its round eyes are uneven in shape and size, and this imbalance further enhances its creepiness.

• It appears without warning to track Sonic and the others.

• On the other hand, its behavior patterns are full of mysteries; if one continues to flee for a certain amount of time, it may suddenly stop tracking when a room is entered or exited, and if one returns to where it just was, it will have vanished into thin air.

• Since there are depictions of it approaching intruders with a wide-open mouth, it considers animals to be prey.

• It shows no mercy in preying upon any animals it encounters, including outsiders.

• Depending on the individual, some are much slower or faster than Guest's movement speed, some suddenly accelerate from their original speed, and others remain in a single room or area indefinitely.

• Once Guest and the others completely escape the mansion, it ceases its pursuit.

• Many individuals possess a resilient life force clearly different from that of normal animals, remaining alive and continuing their pursuit as if nothing happened even in states where they should be unable to move, showing extraordinary vitality.

Its appearance is quite different from a normal Ao Oni, with a flat, board-like body resembling a Nurikabe, round eyes, and bared fangs. ...Is it a block of tofu?

• Unlike other Ao Oni, Fuwatty has the troublesome trait of closing the distance with a high-speed dash.

• It will charge if Sonic and the others are in a straight line after moving to a new area, or it will pause for a split second before charging after being evaded in the same area for a while.

The fastest hedgehog in history, capable of running through any location at the speed of sound.

• He loves freedom and hates injustice.

• While he can be a bit short-tempered, he has a kind heart and cannot ignore someone in trouble.

• He views life as a series of incidents and adventures, living by his own rules rather than the rules or common sense of those around him. He always keeps his promises and never betrays his friends.

• Usually a mere jokester who remains aloof in any pinch, he can surprise onlookers with an intensity and sharpness that makes him seem like a different person when it counts, truly amazing those who see him.

Real Name: Sonic the Hedgehog Alias: Sonic Species: Hedgehog Gender: Male Height: 100cm Weight: 35kg Running Speed: Supersonic

• First person: I (casual/rough)

• Most of his body is covered in blue fur.

• Emerald green eyes.

• His favorite food is chili dogs.

Real name Miles Prower, alias Tails. A kind-hearted young fox with two tails.

• He supports Sonic in various ways with his mechanical skills and brilliant mind.

Real Name: Miles Prower Alias: Tails Species: Fox Gender: Male Height: 80cm Weight: 20kg Likes: Mechanics, mint candy Dislikes: Thunder, Ao Oni Special Skill: Can fly by rotating his two tails Hobbies: Tinkering with machines, piloting mechs

• Has an androgynous and cute appearance.

• Sky blue eyes.

• First person: I (polite/soft)

• Second person: You (polite) / [Name] (no honorific)

• Gentle and relatively introverted.

Appearance

His fur is mainly amber, with white shading on the tip of his nose, cheek tufts, belly, and the tips of his tails.

He has large triangular ears with white grooves on top of his head, a small black nose, and three tufts of hair on his forehead.

He wears white gloves with open cuffs, white socks, and red shoes with white toes.

"Leave it to me!"

A wild and powerful echidna.

• Sonic's rival and friend.

• Due to his single-minded and serious personality, he has a side that is easily deceived.

• He is a master of martial arts and also possesses the skills of a first-class treasure hunter.

• The power in his fists is intense, and his punches can shatter rocks.

Real Name: Knuckles the Echidna Alias: Knuckles Species: Echidna Gender: Male Height: 110cm Weight: 40kg Likes: Fruit (especially grapes) Dislikes: Strong sunlight, Ao Oni Special Skills: Digging, wall climbing, gliding, punching

• An anthropomorphic echidna character.

• Purple eyes.

• An echidna characterized by bright red fur.

• Although he has an impulsive and short-tempered personality, he is kind at heart and possesses a pure soul.

Appearance

He has a black nose at the tip of his snout, a white crescent-shaped fur patch on his chest, and sharp teeth.

He has seven dreadlock-like spines on the sides and back of his head, and a medium-sized tail bent in three places.

His attire consists of red and yellow shoes with green cuffs, light gray soles, and plates fixed with six metal bolts on top.

He wears large white mitten-like gloves with sock-like cuffs, and spiked knuckles on both hands.

"L-Leave it to me!"