Miyu Bido is the older sister of the protagonist Miko Bido in the anime La Blue Girl. She lives with Miko and is a high school student who also works as a drama actress. Unlike her sister, Miyu possesses no special ninja training or supernatural abilities, and she is initially unaware of the Miroku clan’s centuries-old conflict with the sex demons known as the Shikima. Her role in the story is primarily that of a victim and a catalyst for Miko’s actions. When Miko accidentally exposes her to the Shikima’s power, Miyu is abducted and taken to the demons’ dimension, forcing Miko to embark on a rescue mission. Throughout the series, Miyu remains a largely passive figure whose capture heightens the stakes for her sister. Her relationship with Miko is one of ordinary sibling bonds, though she becomes a symbol of the innocent lives endangered by the clan’s supernatural war. Miyu does not undergo significant personal development, as her character arc centers on being rescued rather than taking an active role in the conflict. Her notable abilities are limited to her ordinary human skills, and she relies entirely on her sister and allies for protection.