Yuna

Yuna is a Mother Unit who rules over the systems on Terra. She found Matilda on Forbidden Island, and in order for Yuna to save Matilda, she had take control over Matilda's body. Yuna then placed her body inside of Matilda's dropship. She is accompanied by her Servitor Unit named Gatz. She is the earth goddess who "guards the key."

Trivia
Some fans believe that she is Volnutt's "Mother" since she is a mother unit.