The name of the cartoonist is Koyoharu Gotoge. An interview with the person concerned said the writer is female. She is from Fukuoka in Japan and was born in 1989. She has never been seen publicly, and her true identity is unknown. She started her work as a cartoonist in 2013. Demon Slayer is her fifth product. She is also called "crocodile teacher(In Japanese;Wani Sensei)" because of her self-portrait of a crocodile which wears glasses.