Choumei
Lucky Seven Choumei, Nanabi, Seven-Tails, 重明
Choumei, more commonly known as the Seven-Tails or Nanabi, is a tailed beast sealed within Fuu from Takigakure.
Spoilers:
It was captured, extracted, and sealed by the Akatsuki. In the anime, Choumei is indicated to have been one of the two tailed beasts that Akatsuki cap
