Mokey Fraggle has mauve skin with darker purple fur, long turquoise hair, and wears a long gray robe-like sweater, which is worn open. She wears a ring 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 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, as expressed in "The Garden Plot." Sometimes, though, Gobo finds that she can be blinded to the truth in situations, such as when she was appointed the new Trash Heap. In the language of the ancient Fraggles, "Mokey" means "Put on your hat", which is the opposite of the meaning of Gobo's name.

She does not like the taste of Boober's okra soup. Both she and Red hold the opinion that okra is a disgusting food. During that episode, she didn't want to admit that the Poobahs were silly.