Yoko is a girl from Giha's neighboring village of Ritona who had been chasing the Gunmen that crashed into Giha village during the events of episode 1. She wields an extensive range of firearms, most frequently of which is a long range sniper rifle modeled after the Barrett M82. Although she is of the same age group as Simon, she is very mature for her age and she is one of the most rational members of the group. Despite initially always badmouthing Kamina for his reckless behavior, it did not take long for her to confess her feelings to him. She was also Simon's love interest until he discovered that she was in love with Kamina.