First Hoshikage

The was the founder of Hoshigakure.

Background
Two hundred years before the start of the series, he found a "fallen star" (a meteor) with mystical powers. Once he discovered this, he founded the Land of Bears, in hopes to make well-renowned shinobi and gain the title of a great hidden village. Unfortunately, he didn't know of the side effects of the star training, and people started to die from overpowering chakra that imploded in their bodies.