Zavvi - The Home of Pop Culture Raise your demon slayer and master different breath styles with the latest range of Demon Slayer Tamagotchis from Bandai. Based on your training methods, you can raise your character into one of many different Breath users. Feed your slayer either rice bowl or green tea and play three different games. If you neglect training, your Slayer will become injured. If you do not treat the injury yourself, Kakushi will come.