A Mazone infiltrator in the colony of earthmen living on the Human's Planet in the Ulysses Nebula, Miyu holds the colony's leader Professor Aihn (who once took care of Harlock in his younger days) as hostage, forcing him to use his weather and tectonic-controlling systems against the Arcadia, with the lives of the colony's children hanging in the balance. Miyu meets her demise, like so many of her race before her, at the quick-firing hands of Tadashi Daiba, but not before her machinations virtually ruin the peaceful colony.