Miyu Mido is the older sister of Miko Mido. She pursues a career as a drama actress, forging a path separate from her sister's ninja life. Miyu sports ear-length brown hair and brown eyes, consistently accessorized with glasses and a necklace. She faces kidnapping by Shikima World demons, requiring rescue by her ninja sister Miko. A later revelation uncovers Miyu's true lineage: she is fully human, born from a union with a Suzuka clan member—not Shikima descent. This heritage barred their mother Maria from retaining the Miroku clan chief title, resulting in her exile. Following Maria's exile, Miko trained as a ninja under their grandmother while Miyu's life took a non-traditional path.