Genya is a demon slayer who is trying to be a hashira and make his brother,the wind hashira,Sanemi Shinazugawa proud.His mother turned into demon so Sanemi kill her to protect Genya and then blamed by Genya when he was young.Even being a demon slayer,Genya can't use any breathing style.So he use a sword and a gun to kill demon.Also,he has a special ability that if h eat the demon's flesh ,he can gain demon power for a moment,.Other people will be poisoned when they eat demon.