Red Fraggle is one of the five main Fraggles in Fraggle Rock. She is yellow; her hair is red, with yellow and orange highlights, and is always in big pigtails. She usually wears a red sweater and has the most hair of any Fraggle. Each pigtail is tied with a small pink bow partially hidden within the hair. Red is athletic and energetic. She likes to think of herself as the fastest and strongest Fraggle in the Rock. She is highly competitive with her friends, which sometimes causes extreme interpersonal problems, especially with Gobo Fraggle (though she has admitted that, despite their constant competition, she secretly admires him).[1] Red also has her share of insecurities; she especially hates to admit her mistakes. Red loves sports, especially diving and swimming. Her job is to clean the pool in the middle of Fraggle Rock. She also teaches swimming classes and considers herself an expert at rock hockey. Red shares a room with her best friend Mokey Fraggle, yet doesn't get along very well with Mokey's plant Lanford. Red later strikes up a friendship with Cotterpin Doozer. She is particularly loath to listen to Uncle Traveling Matt's postcards.

Gobo Fraggle is one of the five main Fraggles in Fraggle Rock. In Gobo's earliest appearances, he wore a striped yellow sweater with a brown vest. Gobo Fraggle is an explorer, just like his Uncle Traveling Matt. Whereas Matt explores Outer Space (which is what the fraggles call the human world), Gobo devotes himself to the exploration of Fraggle Rock's many caverns and unchartered regions. Gobo is also the only Fraggle who is brave enough to go into Doc's Workshop to pick up his uncle's postcards while evading Doc's dog Sprocket. Whenever the Fraggles are in trouble, Gobo finds inspiration in these postcards.Gobo is adventurous, clever, and kind. Although he is a good leader, he has a tendency to be conceited and domineering on occasion. He shares a room with his best friend Wembley Fraggle, and is close friends with Red Fraggle. Gobo has an accomplished singing voice and plays the guitar. His dialogue is occasionally peppered with a Canadian-sounding "eh," He is allergic to radish bars.

Wembley Fraggle is one of the five main Fraggle characters in Fraggle Rock. His skin is yellowish-green. He has a long nose, big movable eyes, and a big tuft of yellow hair on his head. He usually wears a palm tree shirt. Wembley is the youngest Fraggle of the group. He is often cheerful and energetic but also very insecure. He usually agrees with everybody at the same time because he hates to argue. Wembley never seems to make up his mind: he even has trouble deciding which shirt to wear, although he owns only two, which are identical. Wembley shares a room with his best friend Gobo Fraggle. He loves to play the bongos and is a siren for the Fraggle Rock Volunteer Fire Department.

Mokey Fraggle is one of the five main Fraggles in Fraggle Rock. She has mauve skin with darker pink fur, long turquoise hair, and wears a long gray robe-like sweater, which is worn open. She wears a ring pull on a string of beads around her neck. Mokey is a dreamer. She loves painting, writing poems, writing in her diary, meditating, or just enjoying her surroundings. Because she is the oldest of the Fraggle Five, she functions as the 'den mother' within the group. Mokey is very emotional and concerned about others. She's always ready to help a friend in need, even if it's a Gorg. Mokey's job is to pick radishes in the Gorgs' Garden, and she is a member of the Clinging Creepers Emergency Flower Defense League. She is quite dexterous with her tail, enabling her to wet the tuff to a point and use it as a brush for one painting, while using her hands to paint another picture with conventional brushes. Mokey shares a room with her best friend Red Fraggle. Mokey often cares for Boober Fraggle, such as when she made a hat out of sticks to replace his supposedly "lucky" hat. She has a pet plant named Lanford. Mokey has a soft spot for the Minstrels, whose music she thinks is beautiful; her love of the Minstrels' music drove her to attempt to join the Minstrels once. She also believes that Gobo Fraggle is very brave and admires him for that Sometimes, though, Gobo finds that she can be blinded to the truth in situations

Boober Fraggle is one of the five main Fraggles in Fraggle Rock. He has bluish-green skin and fur, red hair, and no visible eyes. He usually wears a brown cap and scarf. Unlike other Fraggles, Boober does not like fun and games and spends most of his time worrying about doom and disease. When he's not worrying about himself, he's busy warning others. He is easily frightened and suffers from a variety of phobias. Because of his fears, he is very knowledgeable about health and superstition. He has a lucky charm for just about anything — often multiples. Aside from his friends, there are only two things in life that Boober is very fond of: laundry and cooking. Among Boober's laundry is an assortment of socks Boober lives on his own in a hole. He often hangs out with Wembley Fraggle and is easily annoyed by Red Fraggle's endless enthusiasm. Although Boober denies having a sense of humor, even priding himself in being unable to guffaw, he has a fun alter ego named Sidebottom who appears in his dreams.