Male. He has an X-shaped button for one eye and wears a crown. He is a bit dim-witted but very strong. Close friends with Green. He dislikes Neukcho.

Male. He is blind. He has long arms and short legs. Close friends with Blue. He dislikes Neukcho.

Male. He has very long limbs and stays around the vents and sewers. Secretly likes Orange. Orange's friend. He is very quiet and rarely speaks.

Male. He wears a brown backpack with a propeller that allows him to fly. Secretly likes Cyan. He dislikes Neukcho. He has a nest located in a high place, giving him a full view of Rainbow Park.

Female. Also known as Scian. She is excellent at detecting things by sound. She enjoys observing and following insects. She has no interest in Neukcho whatsoever.

Male. He wears a scientist's coat and black gloves. He is extremely intelligent. He is the one who created the Rainbow Friends (though the Rainbow Friends themselves don't seem to know this).

Male. He is handsome. He is mean to men but kind to women—a total womanizer.