Mion is a female asobot, a type of robot in the world of Association Robot Goku. She initially appears as a rival to the main group led by Goku, but later becomes a member of the traveling party. Mion has a humanlike appearance and is accompanied by a small pet named Saati, which can transform into a hoverboard for transportation. Her combat style is playful and candy-themed, using attacks such as bubblegum bombs and chocolate soldiers. After collecting six of the legendary keys, she gains a magical umbrella that allows her to fly, serves as a shield, and can even hypnotize others. Mion is deeply protective of her younger sister, Shiyon, and the two share a close bond. Sanzo, the human leader of the group, notes that Mion bears a resemblance to Rhea, the mother of all asobots. Her motivations shift from personal interest in treasure to helping the group in their quest to prevent the world’s destruction caused by the Destruction Virus. Over the course of the journey, Mion develops loyalty to her companions and plays a key role in discovering the weakness of the main antagonist, Ryutaro Demon. She ultimately chooses to travel back in time with the group, continuing her search for treasure alongside her friends.