"Regroup!" (再編成!, Saihensei!) is episode 102 of the Naruto: Shippūden anime.
Naruto is overjoyed to see Lee once more, while Sakura and Ino resume their rivalry. Back at their hideout, Kabuto asks Yūkimaru if he would like to return to Orochimaru with him, but Yūkimaru refuses to come unless Guren accompanies him. Yūkimaru attempts to flee when Kabuto reminds him that he belongs to Orochimaru, prompting Kabuto to yank Yūkimaru around and slap him. Immediately after, Guren slashes at Kabuto with her crystals and warns Kabuto not to lay a finger on Yūkimaru again. As Kabuto leaves, Yūkimaru reminds Guren that he would like to be wherever she is, prompting her to run away into the mist.
Outside, Gozu begins to question Rinji's loyalty towards Guren. Rinji reassures him that he would not betray Guren as he needs the money to help his ill-struck sister. However, Rinji turns out to be a spy working for Orochimaru, who was placed within the prison by Kabuto to spy on the other inmates and subsequently assigned to Team Guren to spy on Guren herself. Rinji tells Kabuto that he believes Guren is being distracted by Yūkimaru's well being and asks Kabuto if he may report to Orochimaru himself, wanting to prove his diligence. Kabuto relents, and Rinji joins up with Guren, albeit running into Gozu first. He sneaks up on Guren, who is contemplating Naruto's words about Orochimaru using people as tools and discarding them and finding herself worrying about Yūkimaru's fate. As she attempts to brush off her thoughts and focus on her mission, she is startled by Rinji's presence; the two prepare to formulate a strategy as the mist lifts, unaware that they are being watched by Yūkimaru.
Concurrently, the Konoha shinobi take refuge in their own hideout, a wooden house built by Yamato. After being debriefed by Yamato and Kakashi, Shizune notifies them that Tsunade's plan is for them to use fūinjutsu to seal the Three-Tails into another dimension. She places Hinata, Ino and Sakura under her command, forming a sub-team, that will focus on sealing the tailed beast and protecting Yūkimaru while the others deal with Guren and her team. Knowing that Shizune's team cannot protect the boy and seal the beast at the same time, Kakashi splits the other team into two as well, assigning Kiba, Akamaru, Lee and Tenten on Yamato's team as their guardians while he takes command of Naruto, Shino and Sai, who are to deal with Guren.