A sweet but impulsive and cocky little girl, Millie is the youngest and smallest member of the Lily Five and frequently seen in the company of Ellie. When her shamanic powers emerged, she was rejected by her mother. She and Ellie are the first to appear in the anime series in an attempt to thwart Yoh from properly qualifying for the second round of the Shaman Tournament by eliminating him before he faces Tao Ren. Millie tends to interact with Yoh's group more than the rest of the Lily Five and develops crush on Lyserg Diethel. Her spirit is Onibi-Onibi, who appears in a shape of a fireball with a face that resembles that of a fox, that when merges with the slingshot becomes a crossbow.