A male scientist wearing a lab coat and black gloves. He is highly intelligent and the one who created the Rainbow Friends (though the monsters themselves don't seem to realize this).

A male monster with a button for one eye (marked with an X) and wearing a crown. He is somewhat dim-witted but possesses immense strength.

A male monster who is completely blind. He has long arms and short legs. Even if a human is hiding in a box, they will be caught if Green's hands touch them.

A female monster resembling a very small orange lizard. She spends most of her time sleeping in her area. If the players (humans) fail to refill her food bowl while she's asleep, orange lights flash across the park and she sprints around at high speed. You can survive by hiding in a box.

A female monster with extremely long limbs who lives exclusively in the vents. She watches through eyes in the sewers and uses her long arms to snatch players (humans) passing by, dragging them into the depths to eat them.

A male monster resembling a yellow pterodactyl. He wears a brown backpack-like device equipped with propellers that allow him to fly. He takes players (humans) back to his nest to consume them.

A female monster, also called Cyan. She is mint-colored, armless, and looks like a dinosaur. She has many teeth and detects prey by sound; she is even capable of eating players (humans) who are hiding inside boxes.