Genya Shinazugawa

Shinazugawa Genya is a Demon Hunter of the Demon Killing Corps. He is also the younger brother of the Wind Pillar Shinazugawa Sanemi.

Final Selection Arc
Genya participated in the Final Selection exam, managing to survive the seven day trial. He impatiently inquired about receiving his Nichirin Blade, angrily hitting both his Kasugaigarasu and one of the proctors when his demand went unfulfilled. He was then grabbed by Kamado Tanjirou, who promised to break his arm if he didn't immediately let go of his second victim, something Genya dared him to do. Tanjirou obliged, leaving the irate youth to nurse his broken limb, with the choice for the alloy of his future sword then presented to him.

Demon Train Arc
Later, at the Butterfly Estate under unknown circumstances, Genya intentionally tried to bump into Tanjirou, ignoring his greeting afterwards. He later received the report of Rengoku Kyoujurou's death via Kasugaigarasu, in the company of Himejima Gyoumei.

Swordsmith Village Arc
Genya later appeared at the Swordsmith Village, ignoring Kanroji Mitsuri's asking of his name, and is found by Tanjirou in the hot springs. The scarred youth ripped one of his teeth out and discarded it, accidentally hitting Tanjirou with it. He turned when his name was called, angrily told his fellow Demon Hunter to drop dead, and plunged his head into the hot water when he persisted in talking with him. He also didn't show up for any meals, having told the villagers he wouldn't eat at all. When Tanjirou went to bring him some leftovers, he wasn't in his room.

A few days later, Genya listened with impatient anger as Tanjirou explained the situation with Haganezuka Hotaru and the rusted Nichirin Blade, and then exclaimed that he didn't care and that Tanjirou shouldn't talk to him as if he were his friend. He reminded his companion that he had broken his arm, told him not to call him by his first name, broke the rice cracker Tanjirou offered him, and told him to get out. He fell silent when Tanjirou pointed out his regrown tooth, telling him that he must be seeing things, but was disgusted when his companion showed him the tooth in question. Telling him to throw it out, the scarred youth kicked Tanjirou out of his room.

Genya appeared during Tanjirou and Nezuko's battle against Hantengu, aiming his gun at the Upper Moon's staff-wielding form, Sekido. He shot a cluster of bullets at the Demon, completely decapitating Sekido but failing to completely do so with Karaku. Moving in to finish the job with his Nichirin Blade, Genya ignored Tanjirou's advice, proceeding to complete Karaku's decapitation. This lead to the two Demons becoming four, and Genya was stabbed through the chest by the spear-wielding Hantengu, Aizetsu.