Yoko Machi

Little is known about Machi. Her parents are fishermen and she has described her older brother as being similar to Ushiro in behavior. She was the one who discovered Kokopelli's cave and she was reluctant to sign the contract but Waku's push forced her to become a part of it. When the children were introduced to their chairs, Maki initially thought Machi's chair was hers.

(Source: Wikipedia)