Rei Mii is Ra Kan's orphaned niece. Her mother Mii Ren died at an early age, but her father Rei In survived long enough for him to witness Mii learning to pilot a Lanstag. He was killed in battle some time later, and left her with his Zoid, asking her to take his place in Ra Kan's force. Fleeing Digald, Ra Kan had intended to leave his country alone, but Mii followed him anyway. Eventually, this took them to Mirodo Village, where the series would begin. She would travel with Ruuji and Ra Kan for basically the rest of the series, eventually taking her place as the princess of Zuuri, the city that was built to replace their fallen country. She would be assigned to a defensive role in Ra Kan's anti-Digald army, but would be present in the final battle. Here, her Lanstag would be destroyed by