Luna’s Sister (Trivia)


 * This episode is for National Sister Day.
 * Greg’s little sister Sadie makes her first appearance.
 * Wendy and Sierra make their second appearance in this episode, the first being Sibling Relativity!.
 * Bianca, Orson, Ursa, Pearl, and Ribbon all make their returning appearances in this episode.
 * Luna Girl meets her sister Selena for the first time.