Naraku

Naraku (奈落 Abyss) is a deadly ninja assassin and antagonist in "Shinobi". He is the leader of the Assassins Guild known as the Kigetsu-Mon; a powerful sect versed in dark sorcery.

About
One of the Four Dark Warlords of the terrorist organization "Testament", Naraku is the leader of the assassin's guild "Kigetsumon". Bearing the cursed Black Armor of Mara, and the soul eating phantom blade Kikaku, he is the Kigetsumon's ruthless super assassin. His desire for immense power is rivaled by his desire for glory for the clan.

Rumor has it that Naraku's lover, Kuyo, has discovered a plan to betray the clan, but before telling Naraku, she was killed by the traitor. Naraku discovered the traitor's identity, but even after avenging her, his emptiness would not be filled without her. To obtain Naraku's skill and power, Testament made him an offer he couldn't refuse; Kuyo's resurrection and unlimited funding for his clan in exchange for his services. Naraku accepted their offer, but suspects ulterior motives.

Personality
A cold and ruthless assassin, Naraku is the very definition of a demon ninja. His ability to kill without conscience is rivaled by his loyalty and devotion to his clan. Though a killing machine, he isn't without a heart, as for everything he does is out of love for his clan, and his desire to restore his beloved Kuyo to life. To that end he readily gave up his humanity, putting on the mobile suit "Mara" and took up the cursed sword of the Kizuki family, Kikaku.

Though he accepted Testament's offer, he is a cautious man, and is suspicious of their true motives, and keeps himself close to them to ascertain their objectives.