Seimei

was the founder of Takumi Village. He was known for creating weapons for the other shinobi villages.

Ultimate Weapon arc
Hoki, Kujaku, Ryugan, and Suiko removed his body from his crypt with the power of the Shukaku. Once the preparations were complete, Seimei used the weapons from his comrades to create the "ultimate body". He was later killed by Gaara. Though Seimei was difficult to kill, the fight was essentially over when he was hit by the Ultimately Hard Absolute Attack: Spear of Shukaku in his chest, demolishing the so-called "indestructible" armor. Gaara wasn't taking any chances, and followed up with a Sand Waterfall Imperial Funeral in the pit of sand he had created using minerals from bedrock.