Jiji

Jiji is described as being the same age and of a similar physique to Sasuke Uchiha.

Jiji was originally a ninja of Sunagakure. A few years prior to the events of Sasuke Retsuden, the Prime Minister of the Land of Redaku visited the village while he was touring the region. While there, he hired Jiji to come to Redaku and train an army of ninja, as Redaku was historically a peaceful country with no combat experience. Jiji travelled to Redaku's capital city and was given a room in the royal palace; one of the palace maids, Margo, was assigned to attend to him. Over time, Jiji and Margo fell in love, with Jiji deciding to abandon the life of a ninja in order to be with her. Although Jiji and Margo tried to keep their relationship a secret, the Prime Minister found out about it. The Prime Minister offered to let their relationship continue on the condition that Jiji spend a year assisting Zansūru, a researcher loyal to the Prime Minister. Jiji agreed and promised Margo that he would return to her in a year's time. Jiji went to the Astronomy Research Institute, where Zansūru had uncovered a way to revive the dead; because Zansūru was not a ninja, he needed Jiji to perform it on his behalf. Jiji revived a "dragon" that they named Menō, which he tasked with guarding the prisoners who were incarcerated at the Astronomy Research Institute. After a year working with Zansūru, Menō remained the only dragon they had revived, and Jiji prepared to return to Margo. Just before he left, however, he received news that Margo had died, a casualty of some epidemic in the capital; the Prime Minister even sent him a copy of her death certificate. Jiji lost his will to live, as he believed Margo's death was his fault, that if he'd stayed with her she would still be alive. Zansūru suggested that the same jutsu that had been used to revive Menō could also be used to revive Margo; if Jiji would continue helping him assemble an army of revived dragons, he would track down Margo's body so that she could be brought back to life. Although this was Jiji's first time hearing Zansūru's plans for a dragon army, he did not care, and agreed so long as he could have a chance to see Margo again. Jiji was embedded among the prison population as prisoner #544, telling others that he'd be convicted of stealing food. He spent most of his time acting as any other prisoner, but also began secretly searching for polar particles for some unknown purpose, though he could never make enough sense of the Institute's documents to find where they were hidden.