Rhiannon
Rhiannon is a character who appears in the episode "Nite Owls." She is a fairy who combats the effects of sleepiness.
Description
She is a pink fairy with white hair. She wears a dress made out of leaves, brown boots, and a purple cape.
Role in episode
She appears to SpongeBob, Patrick, and Sandy in an orb of light and turns the tree creature they were hallucinating back into a normal tree. When SpongeBob asks who she is, she tells the trio she is the princess of pep, the enigma of energy, the baroness of bubbly, a creature of the night, and likes black tea with biscuits and butterscotch, ghost peppers, and kicking it up a notch. She informs them that they've made it to 3 AM, then disappears.
She appears once more when SpongeBob, Patrick, and Sandy fall asleep on a rock, and throws a blanket over them.