Genya possesses a relatively strong foundation as a Demon Slayer even without a breathing style. He was a foul-mouthed and hot-headed individual who refused any help from others and was impolite and ill-mannered. After some time, he developed a Tsundere persona. His older brother Sanemi refusal to acknowledge him made him insecure as he realized just how weak he is compared to him Nonetheless, he did whatever he could to help his allies, even if it got him injured in the process.