Rengoku Kyojuro, a well-known, well-loved Flame Pillar. It was no secret that he was a strong Demon Slayer — but just how strong?

Rengoku stood in a circle of demons, all lower-class. Their rank wasn't the problem; the numbers were. It was like the amount of demons never ended. He had a serious look on his face, and stiffened when he heard a bush rustle.