Natsuki Sujiang, an "atypical ninja" who traveled through time twice. Traveling through the world of Naruto for the first time, he became Orochimaru's scientific research assistant and got a glimpse of the secret of immortality at the edge of forbidden arts and human nature, but died unexpectedly. When he opened his eyes again, he was already in the world of Demon Slayer.
There is no chakra here, but there are man-eating ghosts and heart-burning swordsmen. Without powerful offensive ninjutsu, he relies on the "auxiliary" knowledge he mastered from Orochimaru such as earth reincarnation, shadow clones, and barrier techniques to reshape the Demon Slayer's tactical system with his unique "scientific ninjutsu."
He will strategize as a military advisor: use shadow clones to build an intelligence network, and use enchantment techniques to build an absolute line of defense.
