The bullets he uses are made of Scarlet Crimson Iron Sand and Scarlet Ore, allowing him to kill demons without a blade.
In the simplest terms, the reason that Genya can't use Breathing Styles stems from his inability to achieve the total concentration breathing that other demon slayers use in order to access their abilities.
Due to his brother, Sanemi's criticism and his lack of power, the young and desperate Genya consumes demon flesh in order to become stronger. However, that takes away his ability to use breathing techniques, which is why Genya is unable to master swordsmanship.
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.
Supernatural Abilities
Demonic Transformation: By consuming the live flesh of a Demon, Genya could temporarily gain demonic attributes from it. Depending on the strength of the individual, he could gain regeneration and physical strength equal to one.
Genya Safin is a Tailor, a hybrid Grisha who has the power to alter people's appearances. Because of her unique gifts she has been placed in service to the Queen of Ravka, a situation that has isolated her from other Grisha and made her an outcast among her own people.
Demon Slayer's Genya Can Eat Demon Flesh
This allows him to temporarily gain demonic abilities, such as regeneration or heightened strength, making him immortal while in demon form.
(Genya wears white because she's a servant of the Little Palace.)
After being attacked by nichevo'ya, or the nothings, her skin is scarred all over, and she has one remaining eye.
As the Upper Moons pose a grave threat, Genya's demon abilities prove crucial in the battle. But behind his determination to become a Hashira lies a tragic past that drives him to seek redemption and reconciliation with his brother, Sanemi Shinazugawa.
Sanemi Shinazugawa's Green Sword
When it comes to the color of this Demon Slayer sword, it has a jagged green pattern (due to his Wind breathing technique) across its blade, which resembles water ripples created by the wind.
Ruin and Rising
Alexander III wants Genya to be beheaded for high treason and murder, while it becomes clear that he raped her. Genya confesses that she poisoned her own skin so that the king would consume it when he kissed and touched her.
The bullets he uses are made of Scarlet Crimson Iron Sand and Scarlet Ore, allowing him to kill demons without a blade. Nichirin Wakizashi: Genya also carries a shorter Nichirin Sword seemingly being a wakizashi with two hollow ovals that overlap its core and are a dull shade of brown for its handguard.
Sanemi was angry with Genya joining the Demon Slaying Corps as that would've made all his work and dedications to his job pointless- he joined so that Genya could have a normal, happy life, yet there he was; risking his life trying to apologize to Sanemi about something that he had already been long forgiven for.
In the manga, Genya Shinazugawa would consume the flesh of the Upper Moon 4 demon to gain its attributes.
Genya is considered a weaker Demon Slayer, since the Upper Moon 1 acknowledged him to be the smallest threat during his battle against Genya and multiple Hashira.
Demon Slayer: Kimetsu No Yaiba, Volume 20 continues as the Demon Slayer Corps' initial confrontation with the most powerful of Muzan's demons, Kokushibo, has left Tokito severely wounded and Genya cut in half. Miraculously Genya is still alive hoping that his regenerative power can heal even his fatal wound.
Genya is always angry at others because of everything he has gone through in his early life. Every waking moment is an attempt to become stronger, even if it is at the expense of his life. He is doing this only for his brother to acknowledge him.
But Genya is not weak. Rengoku Senjuro once said, in order for the Japanese sword to change color, the swordsman must reach a certain level of swordsmanship.
Healers wear red keftas with gray embroidery. Heartrenders wear red keftas with black embroidery. Genya the Tailor initially wore white to reflect her place of service to the queen, but later in the Shadow and Bone timeline, Tailors would be assigned red keftas with dark blue embroidery.
During the Shadow Fold crossing, volcra attack the sandskiff, but Alina lets out a burst of light killing the volcra in order to save Malyen. Better known as the Sun Summoner, Alina is the protagonist of the series. As one of the most powerful Grisha, she is the only one capable of saving Ravka from the Fold.
He asked impatiently about getting his Nichirin Sword, striking both his crow and Katana violently when his request went unfulfilled. Tanjiro interfered, if he didn't let his hands off Kanata immediately promised to break his arm. Then, when Genya dared him, Tanjiro pushes, leaving him with a broken limb.
Genya Shinazugawa is not a demon in the series. He is a human and utilizes his unique abilities to fight against demons and protect humanity. While Genya's ability to consume demon flesh may have raised questions, it is a result of an experimental procedure and not an indication of his demonic nature.
Kokushiba, the Upper Moon Rank One, cuts Genya in half and brutally wounds him. The young Demon Slayer dies as the battle ends with the strongest of the twelve Kizuki. Genya always had a careless attitude, but his death was entirely unexpected and tore the hearts of many fans.