The Soul Living Inside the Puppet

is episode 319 of the Naruto: Shippūden anime.

Summary
Somewhere in the forest near the battlefield, the Fifth Division led by Mifune is confronted by Kimimaro and Chiyo, both reincarnated by Kabuto to face the Allied Shinobi Forces, Kimimaro quickly charges them geting rid of several units of the battalion, which Mifune gives orders to shy away from such an dangerous adversary. Posteriorly Chiyo enters the battle too using a samurai as a puppet attacking Mifune who defends himself nearly about to kill an ally, fortunately Kankurō arrives in time cutting the chakra threads controlling the samurai avoiding his death, Chiyo seems surprised with Kankurō's presence, realising the puppet that Kankurō brought with him begins feeling guilty and thinking of her sins towards Sasori, recalling the past and the influence she had on his life choices. While looking back at Sasori's childhood memories, after his parents' death, Chiyo kept a link with him through Komushi, Sasori's best and only friend that would die due to a defective intervention carried out by Sasori, later becoming a puppet fulfilling a request by Komushi's mother. Returning to battle, Chiyo starts fighting with Kankurō, promptly gathering more samurai to assault Sasori and Kankurō, which he blocks it by summoning Mother and Father, shocking Chiyo by positioning both puppets in a familiar way to her, Kankurō realises that her did not overcome the guilt through her chakra threads, going to the past memories again he states that Sasori entrusted him of Mother and Father puppets, for future generations, much to the surprise of Chiyo that starts having more memories of Sasori's early life times with his parents, she admits that the puppets are in good hands and falls inert, to Kankurō's despair was just window dressing, and she continues investing over him.