Please note that this is the Narutopedia's article on Sasori's puppet armour. If you are looking for the article on the villain of Naruto Shippūden 3: Inheritors of the Will of Fire then you should head to Hiruko.
Hiruko (ヒルコ, Hiruko) is a puppet used by the Akatsuki shinobi, Sasori. As a puppet, he served as Sasori's "puppet armour", as Sasori was capable of hiding inside of it. Sasori even adorned Hiruko with the Akatsuki's robes, and hid inside it so often that others came to recognise him only when he was wearing it. In the anime, Hiruko is a human puppet made from the corpse of a renowned shinobi. According to Chiyo, Hiruko was Sasori's favourite (十八番, ohako) puppet.
Abilities and Weapons
All weapons installed in Hiruko were coated in Sasori's special brand of poison, which would kill the victim after three days of painful paralysis.
Extendible iron tail provided offence by stabbing and defence by rotating around the body.
Heavy back shell for additional defence. A new addition since Chiyo last saw it twenty years ago.