Gyuki the Eight-Tailed Ox is one of the Bijuu spirits. It is hosted by Killer Bee, and is the only noted case so far of a Bijuu spirit being friends with its host.
Gyuki is held within its host Killer bee, the younger brother of the Yondaime Raikage. unlike most other junchirichi, Bee was able to gain control of the tailed beast within him, and became paeceful with it. the trust bond between the two allows Bee access to a reliable mentor in the Hachibi, and also allows Bee to borrow the Hachibi's chakra without risk of being possessed.
Bee is able to gain a chakra cloak with 7 or 8 tails of the Hachibi when he borrows his chakra. A 1 tailed form of this cloak was seen once when he fought Kisame with the Samehada, which drained 6 tails worth of chakra from him.
When Bee gains more Bijuu chakra, he enters Version 2 state entering a form very similar to Naruto's 6 tails form, with the skeleton of the Bijuu on the outside, albeit with Bee's sanity intact.
Bee is able to partially tranform into the Hachibi, often forming tentacles for defense or offense. this requires considerably more skill than to transform completely, as it requires maintaining two states at once.
when the situation requires, Bee fully transforms into the Hachibi, with the bijuu and himself alternating in consciousness, and has the full powers of the Ox at his disposal.
Naruto the Movie: Blood Prison
The fifth Naruto Shippuden movie. Naruto is accused of attacking the Raikage and assassinating Jonin of the Stone Village and Mist Village. He's stripped of ...