Olivia is the main villain of the Sabrina's Secret Life episode Witchycology. She is Cassandra's former enemy from Magireland (a pun on Ireland). After littering with Cassandra after becoming friends, Olivia became obsessed with litter and tried to poison the Netherworld after a coup d'etat made her the queen. She tried to kill Sabrina and Salem by throwing them into a pool of radioactive slime, but ended up a rock for her crimes, and lost the title of queen.
