Basically, as a result of his serious gnashers and iron stomach, Genya can devour demon flesh and gain characteristics like the sharpened fangs, frosted tips, and black pupils seen in the most recent episodes. Pretty impressive.
Powers / Skills
Marksmanship. Proficiency in Nichirin sword. Repetition Movement. Demon Slayer Mark (occurs only during transformation) Eating Demons' fleshes grants him temporary demonization.
Genya also possesses “Demonic Transformation”, where he temporarily gains demonic attributes by consuming the live flesh of a demon. He can gain regeneration and physical strength equal to the demon he is consuming the flesh of.
His mental state pushed him into a corner. where he ended up eating a demon. Then he discovered this idiosyncrasy as his own ability. You see, he eats demon to absorb their abilities, even if it's just a small piece of their flesh.
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.
For a short amount of time, he can become a demon using his bite strength and his special digestive organs." Basically, as a result of his serious gnashers and iron stomach, Genya can devour demon flesh and gain characteristics like the sharpened fangs, frosted tips, and black pupils seen in the most recent episodes.
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.
So, Genya originally wore white, the color of the servant uniforms, because she was seen as a servant by the queen. But later in the story, she is allowed to wear Grisha colors, and Alina describes her kefta like this in Shadow and Bone (Chapter 20):
Unknowing that his mother was the demon, or "wolf", Genya screamed at Sanemi and labelled him as mother's murderer, an action that he reminisces regretfully.
Genya possesses an astonishingly powerful set of jaws and teeth, enabling him to effortlessly tear through the flesh of Demons and consume them without any negative repercussions on his own body. This extraordinary ability also provides a glimpse into the remarkable efficiency of his digestive system.
Genya has some minor infatuation on Sakura Igarashi. He was very extremely jealous of Hikaru Ushijima for having his crush and later he might become suspicious about his business that Hikaru mentioned.
He fired a bullet that not only damaged Kokushibo, but also sprouted roots that trapped him to the ground. This allowed Gyomei and Sanemi to deliver the final blow on Kokushibo, killing him soon after. Unfortunately. Genya succumbed to his injuries and his body crumbled away as Sanemi held him.
3 Can Defeat: Genya Shinazugawa
Even so, because Tanjiro can technically use two breathing styles and Genya can use none, we've got our money on Tanjiro winning.
After eating the cells of two Upper Ranks Demons, Genya developed a Demon Slayer Mark of his own that appeared during combat against an Upper Rank 1. His flame-like Slayer Mark helps him battle against Demons.
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.
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. However, Genya can absorb a demon's power by eating part of them, gaining its abilities, and shaping them into his own unique Blood Demon Art.
Genya was killed by the Upper Moon 1, Kokushibo, but not before helping the others take him down. As he was dying, his brother Sanemi regretted how strained their relationship have become, and wept as he begged the heavens to spare Genya. Like a demon, his body disintegrated as he died.
Kanae Kocho
Not much is currently known about Kanae and Sanemi's relationship. Gyomei Himejima claims that Sanemi had a crush on Kanae, though we do not have confirmation from Sanemi. We also do not know if these feelings were reciprocated.
Genya is the first of all Grisha to share her specific talent, and she is curious, knowledgeable, and kind. But she is also tool used by the Darkling to endear himself to the royal family by gifting her talents to the queen (and making her body easily accessible to the king, who sexually assaults her).
Towards the end of the book when the Darkling finds Alina, we find out that the Darkling unleashed nichevo'ya on Genya because she spared Alina. Her skin is scarred all over and she only has one eye left.
heart wrenching, intense, and you won't want to put the manga down until the last page. 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.
King Alexander III continues to rape Genya which allows her to poison her lips as part of The Darkling's attempted coup. After Alina escapes the Little Palace, the King falls ill due to poison. The Apparat rules in his stead until the fall of Novokribirsk.
Genya's tragic past
Genya's flashback explains how they had an abusive father, who used to hit his children and wife frequently. After their father died, the two brothers stay close, and the responsibility of looking after their family falls on Genya and Sanemi.
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.
The most accurate assumption to make here would be that he cannot perform concentration breathing and improve his breath. This is something that is quite intuitive and the main reason for his inability to perform said techniques is probably because he lacks the natural talent to do so.