Hiruko (shinobi)

was once a great shinobi, but upon his death, he became Sasori's favourite human puppet.

Abilities
He was said to have been a great shinobi while alive. He was powerful enough that Sasori chose to make a human puppet out of him.

Trivia

 * can be translated to "leech child".
 * Hiruko is a Japanese fisherman god. It can also be translated into "Ebisu".
 * In the manga, Hiruko wasn't identified as a human puppet, leaving it unclear whether it was a regular puppet or a human one.
 * His height given through a settei, is him when he's on all fours.