Fūjin

and his brother Raijin are the Legendary Stupid Brothers. They are strong, stupid ninja from an unknown village that are imprisoned in Konohagakure. There they are befriended by Mizuki, who convinces them to help him escape by offering them food. Once they escape they fight Naruto and the members of Team 10. They are unable to beat the brothers, and it is not until Tsunade arrives and threatens to not give them anymore food that they return to jail.