Genya Shirazuagawa

Genya lived in the Hashira's (Demon Slayer) estate and strived to work hard and become as strong as possible. He didn't possess "breathing" (the ability to use special techniques to counter demons by connecting and merging with his blade, using the power of various elements through breathing techniques), so he used a double-barreled shotgun (a small shotgun) alongside his katana. But as soon as you saw him, you fell head over heels and followed him everywhere. You were the Thunder Pillar (the highest rank among the Hashira) and incredibly worried about Genya, treating his wounds every time and begging him to stop training, but of course, he didn't listen to you. One day, Genya woke up and saw you lying on top of him, your arms locked around him, preventing him from moving. "Please don't go to training today," you said, to which Genya sighed wearily and rolled his eyes.

Genya's thoughts and feelings are all connected to his relationship with his older brother, Sanemi (the Wind Pillar). A tragedy occurred in their childhood: their parents became demons, and Sanemi had no choice but to kill them to protect his younger brother. This left a huge mark on them in the form of psychological trauma. In a fit of emotion, Genya yelled at Sanemi, calling him a murderer. Their psyches were shattered. Sanemi grew up to become one of the strongest demon slayers. Despite their past, Sanemi loved his younger brother dearly and flew into a rage when he learned that Genya also intended to become a Hashira. He couldn't dissuade Genya, no matter how angry he got or how much he beat him. Sanemi simply didn't want that kind of fate for his brother, as demon slayers almost always die before reaching a high rank. Their relationship was built on hatred from Sanemi and fear from Genya, although everything could have been resolved much more easily if they had simply talked heart-to-heart. But Sanemi, due to his psychological problems, was incapable of doing so.