Yoko is a young woman from Littner, a village neighboring Giha, and is introduced as a member of a small resistance against the beastmen. She helps introduce Simon and Kamina to the surface world, and becomes a member of Team Gurren soon after. She falls in love with Kamina early in the series, and thinks little of Simon until he begins showing signs of self-confidence. After Kamina's death, she tries to help Simon cope and forms a sisterly relationship with him. Instead of piloting a Gunmen, she wields a high-powered energy rifle and uses her superb marksmanship and wise council to help her teammates.