Koga Kuchiki sees Byakuya Kuchiki’s scarf and hairpiece and, having never met Byakuya before, concludes that he is from the Kuchiki clan, which Byakuya confirms. Koga enquires if Ginrei Kuchiki is still alive, which Bykuya refuses to answer. Ichigo and Rukia ask how Byakuya knows about Koga, but Senbonzakura appears and tells them to just watch. Byakuya had defeated Senbonzakura right at the start of the rebellion and, on hearing Senbonzakura’s summation, immediately recognised Koga's abilities, having been told of him by Ginrei. They decided to work as double agents to find Koga. Byakuya states he will kill Koga for disgracing the Kuchiki family. Muramasa offers to help Koga, but Koga breaks his Zanpakuto, saying he’ll just get in the way. Muramasa, in a rage, summons the Menos he’d been keeping inside himself. Ichigo destroys several, saying he and Rukia would fight the Menos while Byakuya fights Koga. Neither can outmatch the other in terms of swordsmanship, so Koga switches to using Kido, again with neither able to gain an advantage, until Koga uses a large scale ice spell which seemingly freezes Byakuya, though Senbonzakura releases him. Koga catches him with an immobilizing spell similar to Muramasa’s, but Senbonzakura cuts the threads. Byakuya sems to have won, but Koga starts using illusions to confuse him, and begins to land some hits. Koga states that he sends his Reiatsu into his enemy to manipulate their senses, and that Ginrei and Yamamoto were immune due to closing their hearts. Byakuya says he didn’t close his, because now he can kill Koga, instead of sealing him. Koga attacks with the sealing spears and more kido to immobilize him agin, and tries to finish the fight, only for Senbonzakura to block the attack and free him. Byakuya activates Senkei, and the two continue to battle, with Byakuya gaining the upper hand. Byakuya decides to finish the battle, and as a mark of respect attacks with Shukei.