Gender: Male Color: Blue Features: Has a button instead of a left eye and wears a small yellow crown. He cannot see the player if they are wearing a box. Appearance Period: Day 1 to Day 5 (Finale)

Gender: Male Color: Green Features: He is blind but has excellent hearing. His arms are very long, so he can catch players even if they are in a box. You must simply escape quietly. Appearance Period: Day 2 to Day 4

Gender: Male Color: Orange Features: The smallest and fastest, looks like a lizard and lives in a lizard-like den (Orange's Room). He wakes up every 3-5 minutes. If you don't refill the lizard food, he roams the map on a set path looking to eat players. Appearance Period: Day 3 to Day 4

Gender: Male Color: Purple Features: Has thin, long limbs and a vertically flat, round face with a mouth that opens like castanets. His pupils are large, and he usually lives inside the vents with only his eyes and arms visible. He catches you if you step on the water in front of the vent; you must step on the dry footprint-shaped parts to survive. Appearance Period: Day 3 to Day 4

Gender: Male Color: Red Features: Wears scientist attire and has a very round, spherical head. A mastermind-like character. He is the one who actually turned humans into the Rainbow Friends monsters. Appearance Period: None. Only provides commentary via broadcast.

Gender: Female Color: Rainbow Features: Wears a small gold crown embedded with a ghost-green emerald, and her left eye is covered by a mint-colored cat-shaped eye patch. She is the most cruel monster and secretly has a crush on Blue. Appearance Period: Finale (the very end)