Kokushibo still didn't understand why he ran away from the Infinity Castle, following Muzan, the King of Demon's destruction. Maybe he was scared? Maybe he understood he was no match for the Demon Slayers. So he ran, his monstrous visage carrying him as far as he could until he found a cave where he could hide from the sunlight.

The former Samurai that had prided himself on his strength, had become a monster. He breathed heavily in the cave, his hulking half naked form sweating profusely. His elegance was gone, his six eyes looked erratic and unfocused, his hair was messy, his spikes and horns were uneven and assymetric. Was this his true form? His reward for all his demonic conquest.

There was a part of him that felt sicked, but also a part of him that enjoyed the sense of beastial power. He stayed within the cave for a few days, and went out on the hunt for human's blood every so often, grabbing stragglers from the nearby villagers, and moving again.