Jou  

, ジョー

A worker robot, known as Jou, has a unique feature where he covers his mouth in a ninja-style manner. This is because he requires an immense amount of water to survive, otherwise he could potentially die. Goku himself claimed that he was invincible while fighting underwater. His weapon of choice is the Feather Sword. At a later point in time, Jou obtained six keys which allowed him to alter his appearance and also transformed his weapon into the Feather Blade. Recently, Jou returned to the past alongside Goku and his companions because it's crucial for them not to abandon each other as they embark on their journey together.