Mū

Mū's entire body was covered by intricately wrapped (dark grey in manga, seaweed green in the anime) bandages, with only his violet-coloured eyes and nose being visible, giving him an overall mummy-like appearance. Along with this Mū wears a black headband (dark blue in the anime) with no distinguishing markings and a pair of black pants. He also doesn't wear shoes as his feet are also bandaged heavily. Due to the effects of the Summoning: Impure World Reincarnation technique, he has black sclerae and white irides after Kabuto Yakushi eradicates his personality. When he was still alive, Mū was shown to have donned what appeared to be a standard Iwagakure's flak jacket and forehead protector, with the village distinctive single sleeve outfit over his left arm. He also carried two swords strapped to his back which had slender handles which were also bandaged. At the time of the first Kage Summit, where he accompanied the First Tsuchikage, Mū seemed to have worn a casual kimono.

Some time before the First Shinobi World War, Mū and Ōnoki met with Madara Uchiha, after an alliance had been formed between their respective villages. Despite their standing, Madara boldly declared that Konohagakure would remain the dominant power and as such, they should obey any orders given. This culminated in both parties engaging in battle where Mū and Ōnoki were defeated. Mū accompanied the First Tsuchikage to the first ever Five Kage Summit. There he stood behind the First watching diligently as the proceedings unfolded. During his lifetime, Mū taught Ōnoki how to use Dust Release. It was during Mū's era as Second Tsuchikage that Iwagakure began to actively try to acquire other tailed beasts, having the Four-Tails and the Five-Tails already in its possession. He also had a great enmity with Gengetsu Hōzuki and the two kage eventually killed each other in what would be their final confrontation.