Hiyoko-san is a fictional character from the anime series Norn9: Norn+Nonet. The character is depicted as a small, bird-like creature that adds a touch of humor and light-heartedness to the series. Often seen alongside the main characters, Hiyoko-san provides comic relief amidst the more intense and dramatic moments of the story. Despite its small size and simple appearance, Hiyoko-san's presence is significant as it represents innocence and simplicity, contrasting with the more complex and serious themes explored in the series. Its interactions with the protagonists bring moments of levity, making it a beloved character among fans.