Hiruko (missing-nin)

is the main antagonist of Naruto Shippūden 3: Inheritors of the Will of Fire. He is a missing-nin of Konohagakure who wishes to plunge the world into a Fourth Great Shinobi World War, and then conquer it.

Appearance
Hiruko appears to be a white-haired boy with red eyes, dressed in an oversized, high-collared coat wrapped with leather straps. Most of his body is covered in bandages, including his mouth and arms. Despite his youthful appearance, he is actually closer in age to the Sannin. Without his coat on his hair seems to extend past his shoulders, and down to his hips.

Plot Overview
A contemporary and former friend of the Sannin, Hiruko wished to become a strong shinobi, yet was born with no natural special abilities. To overcome this disadvantage he developed the Chimera Technique, which would allow him to absorb the chakra of other ninja, as well as any Kekkei Genkai they may possess. Some time after the Third Great Shinobi World War, Hiruko divulged his findings on the technique and left the village as a missing-nin.

Dozens of years later, ninja possessing Kekkei Genkai begin disappearing from Kumogakure, Iwagakure, Kirigakure, and Sunagakure, leaving Konohagakure as the suspect and prompting rumors that they are preparing to rebel against the Land of Fire. While on a mission flying over Mount Shami, Sai falls under attack from a mysterious, bird-like monster. Team Kakashi soon arrives to rescue him, but encounter wolf-like monsters, and Naruto is injured in the struggle to escape. When Konoha ANBU are dispatched to investigate, they encounter Hiruko and his followers, Ichi, Ni, and San. Hiruko reassures his followers that there's nothing to worry about, then quickly dispatches the ANBU squad with his Chimera Technique, absorbing their Earth-nature chakra and using it manipulate the mountain itself, crushing them.

With the other nations amassing troops on the borders of the Land of Fire and threatening to invade, Hiruko uses a genjutsu to project his image in the skies over Konoha and deliver a message, announcing that he intends to obtain the Kekkei Genkai of the Land of Fire, becoming immortal and virtually invincible. With the combined power of Kekkei Genkai from all Five Great Nations, he plans to instigate a Fourth Great Shinobi World War and rule the world. In order to carry out this goal, Hiruko has been biding his time so that he can draw power from the Sun's corona during a solar eclipse, which is now rapidly approaching.

Abilities
Though he was born with no natural special abilities, Hiruko compensates by using the Chimera Technique, which he developed, allowing him to absorb the chakra of other ninja, along with their Kekkei Genkai abilities, as well as to perform ninjutsu utilizing their natural elemental chakra affinity. Having already taken the Kekkei Genkai of four of the other Great Nations, Hiruko presumably possesses a number of other enhanced abilities and physical traits. Hiruko can apparantly draw on power from the Sun's corona during a solar eclipse, allowing him to further strengthen this technique.

In addition to these abilities, Hiruko and his followers make use of creatures which appear to be literal chimeras, including a large, bird-like monster that molts explosive feathers and wolf-like beasts that attack using appendages resembling tentacles.

Trivia

 * translates roughly to, "a call to halt vulgarity".
 * Hiruko can also translate as "leech child," which would make sense, given Hiruko's ability to leech chakra and kekkei genkai from other ninja, as well as his youthful appearance.