Naruto: Shippūden episode 419, "Papa's Youth," explores Might Guy's childhood, his relationship with his father, Might Duy, and their dedication to the Eight Inner Gates, featuring a flashback to Duy's ultimate sacrifice against the Seven Ninja Swordsmen of the Mist. This mixed canon/filler episode provides context for Guy's final showdown against Madara Uchiha in the present. For more details, visit Narutopedia .