Demon Slayer+Save the Knife+Return from Overseas
Note: The protagonist's family and Iguro's family are CS. They will be cleaned up later. Saving the knives does not mean that new knives will not be produced.
Kuze Hibiki, a Meiji "waste" who escaped from his family and officialdom, his only ability is to tinker with novel gadgets from overseas. After being adopted by Demon Slayer Mae Naruhashi, he combined the pistol with the Breath of Thunder to create a unique fighting style. He is not a genius inventor, but he is the core catalyst of change - an idea that allowed the Butterfly family to develop a life-saving sachet; an introduction that injected modern ideas into Zhu Shi's research; a sketch that gave birth to the ghost-killing artifact in the Knife Forging Village. He connects scattered geniuses, arms tradition with technology, and rewrites destiny with collaboration.