Genya

Genya Shinazugawa (不死しなず川がわ 玄げん弥や, He is a Demon Slayer in the Demon Slayer Corps and the younger brother of the Wind Hashira, Sanemi Shinazugawa.

As a child, Genya was caring and loving towards his family, looking out for them due to their father's abuse and being the second oldest of his siblings. His protective attitude stems from a promise he had made with Sanemi following their father's death, when he stated that it was now their job to be a role model for their siblings and look after their mother. He was deeply regretful of his inability to save his brothers and sisters following their mother's transformation and blamed himself heavily for his own accusation of Sanemi killing her, despite acknowledging later that he was not at fault and she transformed into an uncontrollable demon.

Genya Shinazugawa is 180 cm (5'11") tall and weighs 76 kg (168 lb).

Genya having hit puberty, had a much more feral appearance, having undergone a growth spurt that put him at almost six feet tall, along with inward-slanting, and large almond-shaped eyes with purple irises, similar to Sanemi’s. His hair is also much longer, worn in more of a mohawk style, the strands much longer and visible around his neck. It is also noted that his boyish features got toned down, and he became more muscular and gained many more scars all over his body. His outfit changed to a dark olive-green version of the Demon Slayer uniform, over which he still sported his old purple yukata.

His abrasive and hostile persona was short-lived, in part due to Tanjiro's influence and camaraderie, and the two would form a deep friendship afterwards. After the attack on the Swordsmith Village, Genya is shown to be a much more pacified and caring individual, giving a warm smile when Tanjiro tearfully reunites with a now sunlight immune Nezuko, inwardly congratulating him for his happiness.

Dual Wielding: Genya utilizes both a double-barreled shotgun with Nichirin cartridges and a Nichirin Wakizashi placed on his rear hip. He is shown to excel in blending both long-ranged and short-ranged combat against demons. Against strong targets, Genya usually sneaks up on them to fire his shotgun and switches to using his Wakizashi should he fail in doing so. Genya has quite a high degree of marksmanship, being able to shoot off Sekido's head and blow off a huge portion of Karaku's and Aizetsu's neck. He also nearly beheaded Sekido even while being shocked by electricity. It has also been stated that he is more adept at using his shotgun than his Wakizashi.

Demons are a carnivorous, vampire-like species whose primary diet is humans. They are also nocturnal as they are weak to sunlight, though they also stay up during the day as they don't require sleep. Demons have an abnormally powerful physical constitution and potent regenerative abilities, making them immune to normal weaponry and granting them the ability to heal from any wound with ease, even re-growing their head. Only the Nichirin Swords, weapons made from special ore with sunlight absorption properties, can inflict life-threatening wounds. However, even with a Nichirin Sword, the only method guaranteed to kill a demon is through decapitation. Demons are also known to hate wisteria, which are poisonous to them and whose smell is repudiated by them.