Yoko Rittona, commonly referred to as Yoko Littner, is a character from the "Tengen Toppa Gurren Lagann" anime series. She is a combat sniper who is part of the Gurren Brigade with friends Simon and Kamina and a robot named Lagann.
Yoko is from Littner village and is the lead female character in the series. She is highly trained in combat, but after the war of liberation, she takes a job as a kindergarten teacher on Koreha Island and changes her name to Yomako. The series focuses on a future in which humans live underground and are unaware that there is an outside world above. The goal of the Gurren Brigade is to protect their homes from invaders who have come from the outside world to destroy them.