Haido

In his human guise Haido presents himself as a mild clergyman: pale skin, bushy light-brown brows and sideburns reaching toward his mouth, a broad nose, and pale green eyes, dressed in a deep blue bishop's robe and matching hat with a monocle fixed over his left eye. The stone unleashes a second shape entirely, a grey-skinned humanoid monster standing more than two metres tall, with red sclerae, slitted black pupils, wild spiky white hair falling in long strands around its face, and four glowing red orbs hovering at its back.

Beneath a soft-spoken, gentle manner that claims to loathe violence, Haido is a ruthless conqueror. He hunts the Gelel vein for power that would mend any injury and make him unstoppable, and he will cut down anyone in his path, his own allies included. His gift is deception: he convinces Temujin that raiders, not he, murdered the boy's parents and then raises him as a servant, while selling the wider world on a dream of a war-free paradise even as he pursues its exact opposite. Arrogant to the core, he rates his own strength far above any foe's.

A merchant from overseas sells Haido the Book of Gelel, and he turns it toward hunting the vein and the dominion it promises. With his knights Fugai, Kamira, and Ranke he razes Temujin's village for the stone, slaughtering its people, but spares the boy after sensing his potential and grooms him as a tool. Unable to reach the true vein, he settles for fragments of Gelel stone, which he implants into his four followers. From a vast walking castle he transforms the village's surviving children into soulless armoured soldiers and drives his search into the Land of Wind, where Gaara and his allies turn back his forces. Brought before him by Temujin, Naruto Uzumaki hears the utopia speech and declines to join.

The stone lodged inside Haido makes him a fearsome fighter. His monstrous form grants crushing strength and blinding speed, and the orbs at his back extend black tendrils that let him fly, reshape into weapons or pillars, and shield him, while the Gelel stone fires piercing energy blasts and mends grievous wounds. When Shikamaru Nara pins him with the Shadow Imitation Technique, Haido shrugs it off with a flash bomb and lays bare his true aims. He finally admits to killing Temujin's parents, blasts a hole through the boy to seize his stone, and casts him aside. Naruto fights on as the freed armoured soldiers turn against their master, and with Temujin's help forms the Gelel Rasengan while a shadow clone shapes the Demon Fox Rasengan. Together the two shatter Haido's stone and drive the attack through his chest; stripped of the vein's healing, he dies, and his body is drawn into a space-time rift and destroyed.