She is a light blue goth fish who wears a purple and black dress, a black bracelet with metal, and a fish bone necklace. She has light pink lips and short dark brown hair.
Role in series
"Mall Girl Pearl"
After Pearl gets a job at the Bikini Bottom Mall, Nocturna teases her and accuses her for being uncool, until Beatrice forces her and Pearl's ex-friends to listen to her stories for an hour. After this, they reconcile with her.
Nocturna appears as one of the attendants of the breaching party.