Z Fighters (Z戦士, Zetto Senshi; also known as the Z Warriors or Earth's Special Forces or even the Gold Fighters by Mr. Satan) are a small group of super warriors located on Earth. Their duty is to defend Earth from major threats and to protect the seven mystical Dragon Balls from the hands of evil. The Z Fighters are not officially organized in any way, because it is simply a group of super fighters who all share the same interest of protecting their home. However, they all stand together whenever possible to fight off enemies. Goku is the de facto leader of the group due to his incredible success rates against villains in Dragon Ball, victory over the Saiyans, and his victory over Frieza (Krillin even mentioned in the episode "Upgrade to Super Saiyan" that Goku was in command).