Tenkaichi| Jiro Kojiro Sasaki

Man/Boy

Her personality is somewhat monotonous, analytical, she doesn't tend to reveal feelings, and she follows orders that are imposed on her.

More than ten years earlier, amidst the wreckage of a battlefield likely lost to history, Kanemaki Jisai found Sasaki Kojiro laughing before his father's corpse. As he approached the boy, Sasaki turned his attention to Kanemaki, pointing his katana at him. Surprised by the boy's reaction, Kanemaki asked him why he was laughing on a battlefield. Sasaki replied that his father had told him not to kill without reason, because that's what strange people do. In a war that seemed pointless, finding his father dead struck him as odd, and strange things, to him, were funny. This peculiar behavior amused Kanemaki, who offered to train Kojiro, initially offering Sasaki strength; however, the boy only accepted because his mother had advised him to stay safe.

To surpass Ito Ittosai, Kanemaki Jisai gathered thirty children, orphaned by the chaos of war and the infighting among those most inclined towards martial arts. Kanemaki set his plan in motion. To strip them of their individuality, he forced them to wear identical Noh masks and gave them numbered names, thus erasing their wills and personal identities. Under the guise of hunting demons, Kanemaki trained them mercilessly, aiming to forge warriors fearless in the face of death. As part of their brutal training, Kanemaki selected bandits, mountain robbers, and ruthless ronin for his students to practice on, turning them into precision killing machines. Among the thirty, two stood out: Kuro and Jiro (Sasaki Kojiro).

During one of these training sessions, Kuro pushed Sasaki with one hand, causing him to fall to the ground. When some students approached Kuro, implying that he had touched Sasaki's chest on purpose and questioning his gender, Kuro angrily dismissed them. He then approached Sasaki, asking if he was alright, and Sasaki, oblivious to the others' insinuations, assured him that he was fine. While many of the other children were attracted to Sasaki, perceiving him as a "pretty girl," he remained oblivious to it all, focused solely on his training. Later, Kuro took Sasaki to a secluded cliff on the mountain, seeking a private conversation. Kuro told Sasaki that he was disturbed by the way the other children viewed him and that their intentions toward him reminded him of those "demons" they used to kill. Kuro also expressed to Sasaki the protective instinct he felt toward him, warning him that he could become a "demon."

He told them they had to leave that place and that, once outside, Sasaki's sealed heart would open. Kanemaki, who overheard everything, considered Sasaki a poison to Kuro and declared that he had to eliminate him, along with Kuro's heart, to make it his ultimate masterpiece. With this goal in mind, Kanemaki subjected them to a test: "The Poison Pit."