Rōshi

is the Jinchūriki of the Four-Tailed Beast. He was captured by Kisame Hoshigaki of Akatsuki and later died as the result of having the Four-Tails extracted from his body.

Background
Rōshi, hailing from Iwagakure in the Land of Earth, was imbued with the Four-Tails at a young age. At some point in his life he went on a journey to understand and control the excessive power of the Four-Tailed Beast residing within him.

Hunt for Uchiha arc
During his journey, he encountered Kisame and battled him. Even though Rōshi used the Four-Tails' power, he was defeated. Later, Akatsuki extracted and sealed the Four-Tails, which led to Rōshi's death. It's possible that Zetsu ate his corpse afterwards, as he usually does this with anyone who is involved with the Akatsuki and it's objectives.

Abilities
By borrowing the Four-Tails' power, Rōshi was able to use its Lava Release ninjutsu, a combination of Fire and Earth-based chakra.