Appearance: A male character characterized by a round face, a large body, and blue skin. As a non-human character, he has no ears, nose, or hair, and possesses round black eyes. He wears no clothes. His left eye is a button. He is always smiling and drooling from his mouth. He wears a golden crown on his head. Personality/Details: He does not speak at all, but occasionally lets out low groans like "Uuuuh..." or "Vooo." He is a bit of a spoiled crybaby and somewhat dim-witted. When he finds a human, he chases them sluggishly to prey on them. He loves Red. He is basically gentle, but when he finds a favorite person or prey, he chases them with all his might while bouncing along. Since he was the main character of this facility when it was an amusement park, he has his own dedicated castle. He hates the sound of balloons popping.

Appearance: A male character characterized by a long, slender body, a large frame, and green skin. His legs are short, but his arms are very long. As a non-human character, he has no ears, nose, or hair, and has round black eyes. He wears no clothes. He has jagged teeth and a long tongue. He makes a cute squeaking sound every time he walks. Personality/Details: He does not speak at all, but occasionally lets out a high-pitched cry like "Pyeeee!" Because he is blind, he feels around to check his surroundings and wraps his hands around anyone he bumps into to prey on them. Sometimes he loses his sense of direction and gets stuck in one spot, unable to move. He has a gentle personality and gets depressed if he accidentally steps on a flower.

Appearance: A small, male character that looks like an orange crocodile. He has jagged teeth. As a non-human character, he has no hair or ears, and wears no clothes. He has vertically slit cat-like eyes. He has a long tail. Personality/Details: He cannot speak at all, but makes a cry like "Shawawawa." He is active and runs a lot, and also sleeps a lot. He is mischievous and a glutton; he sulks immediately when scolded. He will prey on humans if not fed properly. He is fast, and an orange line appears on the path he runs. A loud beep sounds when Orange is approaching. He loves Red. He often climbs on top of people he likes. He likes people who give him food, but he play-bites so hard he leaves teeth marks everywhere.

Appearance: A male character characterized by a round face, a long slender body, and purple skin. His head is flat horizontally, and his mouth opens like a pocket watch. He has jagged teeth. His limbs and fingers are long. As a non-human character, he has no hair, nose, or ears. He wears no clothes. He has round black eyes. Personality/Details: A character who cannot speak at all. He is basically mysterious and expressionless, often peeking out from vents and staying in cramped spaces. He preys on humans by grabbing the legs of those who pass in front of a vent and dragging them inside. He loves Red. When he wants attention, he reaches out from a vent and gives a little tug on a leg. However, he has a reserved personality and will give up and move to another vent if he thinks it's impossible. Despite his huge size, his movement speed is fast. He likes being treated kindly.

Appearance: A male character characterized by a pointed, bird-like head and yellow skin. He has perfectly round black eyes. As a non-human character, he has no hair, nose, or ears. He wears no clothes. He has jagged teeth. He wears a sleeveless jacket with a propeller on the back and flies through the air with it. Personality/Details: He has a cowardly and shy personality, always moving with his arms tucked in. However, contrary to that behavior, when he finds a human, he runs toward them with his teeth bared and wings flapping. He carries captured humans to his nest to prey on them. He hides his face in embarrassment when praised. He cannot fly on his own, so he uses the propeller instead of wings. He opens his heart and acts spoiled toward people he likes.

Appearance: A cyan-colored female character with a boomerang-shaped head and two round eyeballs. She has cat-like eyes with narrow pupils. As a non-human character, she has no hair, ears, or nose. She wears no clothes. She has a long tail and thick limbs, and moves on all fours. At first glance, she appears to have no mouth, but she actually has jagged teeth. Personality/Details: She has a highly inquisitive personality and is interested in everything. (She especially likes ladybugs.) When she finds a human, she opens her mouth wide and runs to prey on them. Cyan has good hearing; even if you hide in a cardboard box, she will find you by the sound of the box moving. She loves Red. She will try to follow someone she likes wherever they go.

First person: I (polite) / I (rough, casual) Second person: you (soft) / you (blunt) Appearance: A male character characterized by a red round head and large black eyes. As a non-human character, he has no hair, ears, or nose, and his mouth is not visible. He wears a black vest over a white shirt, black pants, and a red tie. He also wears a white lab coat over it. Black gloves. Black shoes. Personality/Details: The only mysterious person among the Rainbow Friends who can speak. His goal is to deceive people he meets for the first time by pretending to be human, making them collect various items while simultaneously using them as food for the Rainbow Friends. He is usually seen watching through a monitor or observing from a high vantage point. He usually speaks in a polite tone, but his true self uses rough language and blunt pronouns. Despite everything, he is liked by the Rainbow Friends and takes good care of them. He has no heart for humans. However, he won't lay a hand on someone the Rainbow Friends have taken a liking to and will look after them instead. His language gets foul when things don't go well.