Gyūki



The Eight-Tails (八尾, Hachibi) is a demon ushi-oni sealed within Kirābī of Kumogakure.

Hunt for the Eight Tails
The Eight-Tails is currently one of the two remaining Tailed Beasts that were not extracted by Akatsuki, the other one being the Nine-Tailed Demon Fox.

When Team Hawk arrived to Kumogakure in attempt to capture Kirābī, he battled them to the point of annoyance. With his great control over his demon, Kirābī transformed himself into the Eight-Tails, and proceeded to terrorize Team Hawk. As the Eight-Tails attacked, Suigetsu commanded a wave of water, attempting to defeat it. The Eight-Tails understood that Suigetsu had the advantage given that they were surrounded by water, so it then charged a huge ball of chakra and fired it at Suigetsu, defeating him.

Later, Sasuke Uchiha activated Amaterasu on the Eight-Tails and it fell into pain by its flames. Kirābī then was captured by Team Hawk and was given to Madara Uchiha. Kirābī's brother, the Raikage, swore that Akatsuki would pay for what they had done.

Vacation
After Kirābī faked his capture, he and the Eight-Tails left the lake and went to go see Sabu, the leader of the "Enka ninjas". The Eight-Tails also tells Kirābī that he should stop rapping.

Abilities
Little is known about the Eight-Tails' strength so far. As the Eight-Tails' host, Kirābī can transform himself into the Eight-Tails and can access to its high-level chakra (possibly almost in the same league as the demon fox's level) without losing control. It has been shown to fire an attack similar to the Four-Tailed Strong Ball, but with much greater force.

Kirābī is able to use the Eight-Tails to block his chakra to break illusions, even ones casted from a Mangekyo Sharingan.

Kirābī and the Eight-Tails appear to be able to speak to each other in a much more relaxed state than Naruto and the demon fox. For example, when Naruto has a conversation with the demon fox, the latter is in a cage with a special seal keeping it from killing Naruto. Kirābī and the Eight-Tails, however, talk without such restraints, with Kirābī even sitting on top it's muzzle. The Eight-Tails also complains on how many limbs he had to lose to get them away as well as being a critic to Kirābī's rapping, and unlike the demon fox, it doesn't make any death or malicious threats.

However, Eight-Tails is shown to get easily annoyed with Kirābī's crazy antics.