Skenfrith

Skenfrith is a magical creature who changes his appearance and voice based on others' opinions of what he is. He is found by Red and Wembley in the Gorgs' garden. He receives his name from Red, who also tells him that he has pigtails and likes to swim, among other things; as she creates this persona for Skenfrith, he promptly adopts her beliefs as his own characteristics. His changes only become a problem when the Gorgs believe he is a monster, and he complies.

He appears in Episode 308: Believe It or Not of Fraggle Rock.