Morgana was a fortune teller at the Psychic Circus. She also sold tickets at the entrance of the circus tent. When the Seventh Doctor and Ace arrived at the circus, she tried to stop them from entering, but when the chief clown appeared, she was forced to let them in.
She was conflicted about sending people to their death performing for the Gods of Ragnarok, and tried to explain this to the ringmaster. However, she did not hesitate to send Whizz Kid into the arena.
The chief clown and the robot clowns later forced the ringmaster and her into two large wicker baskets as part of a magic disappearing act to entertain the Gods. When the wicker baskets were opened, both she and the ringmaster had disappeared forever. (TV: The Greatest Show in the Galaxy)