The protagonist of the story, and the son of Tarouza and Oyaruru. He was raised by Tarouza's wife, Tsuyu. After an unknown assailant murdered Tsuyu and her daughter Sayuri, the villagers no longer trusted Jirou and chased him from the village. He then began studying the ways of the ninja under the tutelage of Tenkai. As he grew to adulthood, Jirou gathered pieces to the mystery of the disappearance of his father, and he began to devise a trap to snare Tenkai. In later volumes of the novels, he adopts the name Jirouza Hattori (服部 次郎佐), as well as Gerome Kamui (ジローム・カムイ, Jiroumu Kamui), the name based on that of Geronimo, his adopted father.

(Source: Wikipedia)

A young boy named Jiro finds his mother and sister murdered in his home. Falsely accused of the crime, he flees from his village and meets a priest named Tenkai, who has him kill a rogue ninja named Tarouza. After fulfilling that task, Jiro undergoes training to become a master assassin. Many years later, Jiro finds out that he was an orphan and his real father was Tarouza, who had worked for Tenkai until he aborted his mission when he fell in love with an Ainu woman. The young ninja discovers that the Shogunate was to retrieve the lost treasure of Captain Kidd and use it to once again isolate Japan from the rest of the world. Using the clues that Tarouza had kept secret, Jiro - along with the female ninja Oyuki and a slave named Sam - travels to Russia and America to search for the treasure in hopes of using it to extract revenge from Tenkai. <br><br>
(Source: Anime News Network)

An Italian actor, voice actor, ADR director and dialogue writer, mostly known for his roles as [Monkey D. Luffy](https://anilist.co/character/40/), [Gaara](https://anilist.co/character/1662/) and [Hyoga](https://anilist.co/character/5921/).

A Brazilian voice actor. Known for voicing Might Guy in Naruto, Scar in Fullmetal Alchemist, Hyouga in Shurato, and Alucard in Hellsing