Three-Headed Guardian Beast

The Three-Headed Guardian Beast, commonly called Three-Heads, is a creature sealed in Yumegakure that appears in Naruto Shippūden: Kizuna Drive.

Appearance
Initially, the Three-Heads appeared as a giant monster with a body similar to that of a lion and three heads. Its skin is mostly white and has dark purple on several places, including the underbelly. It has beige-colored armour above the main head on which there are several small, red markings and a row of spikes. The other two heads come out of each side of the armour. It has light yellow-green markings under each head's small eyes and thin and sharp teeth.

After Gensui allowed the Three-Heads to absorb him its appearance changed greatly. Its entire body becomes covered in dark gray armour with pinkish-red markings on several places. Its original armour increases in size and it gains spikes on the end of its tail, as well as pink armour on its underbelly. The necks of the three heads now seem to be composed on thick tissues and are much longer. The heads themselves are covered in purple armour with several spikes and red markings and their rows of teeth are larger now.

Abilities
It is said to be a solid concentration of energy that brings about cataclysms. It is said that the first cry of the beast scorches mountains and plains, the second shakes the earth, and the third returns all to nothingness. In a distant past, even before the Great Ninja War, the seal on the Three-Heads was released, just once. According to one account, even though the monster cried once, the number of dead was easily over a thousand.

When it was unsealed by Ryuka, its power was weakened due to having been sealed for so long. But after Gensui allowed himself to be absorbed by the beast most of its original power returned. While fighting Team Kakashi it showed to be able to emit chakra from its body to bring about negative status effects with its physical attacks, including poison. It also showed a powerful roar that can stun everyone around it and an attack similar to a Tailed Beast Ball: a powerful beam of purple-pink chakra fired from its mouth. It can also fire one from each mouth at once.

Influence
The Three-Headed Gaurdian Beast is greatly influenced by Cerberus of Greek Mythology. Cerberus was a 3-headed hellhound and Hades' loyal watchdog. Cerberus is an influence to the Three-Heads' name since it is also a 3-headed beast tasked with guarding the gates of the Underworld, letting only the spirits of the dead inside but preventing them from leaving. In many folklore, hellhounds are large in size and have red eyes, a possible nod to the Three-Heads' large size and red eyes after absorbing Gensui. Hellhounds are also associated with fire and death, possible influences to the Three-Head's first cry which scorches the mountains and the plains, bringing about death.

Trivia

 * The Three-Heads is very similar to the Tailed Beasts in that it is a living form of energy that can bring disaster.