Ancient One discovered the sealed Armor of Strata and the ghost-child Suzunagi during World War II. He sensed the girl was filled with hatred and revenge, and felt sorry for her. Nevertheless, he was forced to use the Armor of Strata to drive her away when she attacked him. Mia Koji Voiced by: Kaori Kusakabe (Japanese), Teryl Rothery (Episode 2 only), Lalainia Lindbjerg, Maggie Blue O'Hara (OVA) (English). Mia Koji, known in Japan as , aids the Warriors during their quest against the forces of evil. Not much is known about her past, except that she was born in Canada to a French mother and a Japanese father, and was visiting her paternal grandfather when Talpa's invasion began. Unlike her friends, Mia has no super powers or weapons. However, she is extremely knowledgeable about the mystical armors and various ancient artifacts. She provides vital information to the Warriors and acts as a caretaker for Ully. Over time, Mia becomes like an older sister to them. Mia is 17 years old at the start of the TV series. She is 19 in Gaiden and in her early twenties in The Legend of the Inferno Armor and Message. She helps the Warriors in The Legend of the Inferno Armor by decoding the Taulagi's ancient language to track down Ryo and Sage. Her last appearance is in Message as she attends the special session of the United Nations General Assembly addressing the Nether Realm's activities. Mia told the assembly she had "all the answers [they] need," though the scene cut-away before she spoke further. Mia's birthday technically falls on two dates, due to an error by Sunrise. According to the YST book, Memorials, her birthday is listed as May 15, 1970; however, all other merchandise lists her birthday on May 28, 1970. The latter date is the more commonly accepted one by both Sunrise and fans. Mia Koji's Japanese given name, Násti, means "star" in Northern Sámi language while her Japanese surname, Yagyū, is based on the real Japanese clan with the same name. Like most of the characters in the series, many of their family names are based on historical Japanese clans Mia plays the same role in the manga as she does in the anime version of YST. However, her importance is greatly reduced while Ully and White Blaze become major players. Mia begins a romantic relationship with Sage. Ully Yamano