This art item is inspired by Kyojuro Rengoku, a major character of Kimetsu no Yaiba.

Kyojuro Rengoku (煉獄 杏寿郎) was a major supporting character of Demon Slayer: Kimetsu no Yaiba and a major character in the Mugen Train Arc. He was a Demon Slayer of the Demon Slayer Corps and the late Flame Hashira (炎柱 En Bashira).

The kanji means "flame", describing his fighting style Flame Breathing (炎の呼吸 Honō no kokyū) ,and his great enthusiasm and pure heart.