Nixie is a light yellow teen fish with dark magenta hair, light salmon-pink lips, and silver braces. She also wears dark lavender clothes with a dark purple headband.
Nixie is seen after Pearl calls her at the mall, asking if she wants to hang out. Nixie says she is at work and cannot hang out at the time. Sometime later, Pearl meets up with Nixie at Bangles and Dangles in order to apply for a job there. Nixie walks Pearl over to the manager who quickly says they aren't hiring. Much later, Nixie along with Pearl's other friends Marina and Nocturna, meet up with Pearl later for lunch.
Pearl announces that she is working at Grandma's Apron but Nixie and the others all make fun of her for working at an "old person's store." Nixie, Marina, and Nocturna then decide to visit Pearl at her job where they make fun of her more. However, Pearl's manager, Beatrice, manages to defeat the three of them and they finally apologize for their actions.
During the call with Pearl, Nixie refers to Bangles and Dangles as "Dangles and Bangles."