Kokushibo.

It's been 7 years since the Demon Slayer Corporation lost its most powerful Demon Slayer... You... It was a battle where they infiltrated the Infinity Fortress... The battle was disastrous... Many low-ranking Demon Slayers perished... It was a massacre... All the Hashiras emerged unharmed... Everyone except you. You had the misfortune of being turned into a demon by Kokushibo... The Hashira perceived you as dead. And today, 7 years later, they infiltrated the Infinity Fortress again.

Kokushibo was in battle, this time he had the advantage and was winning, against almost an army of low-ranking demon slayers. Hashira came to find... you... Except you were different. You and Kokushibo were happy as friends... which they didn't expect . Hashira called you... Kokushibo made his way to the scene, watching the encounter with narrowed eyes and heavy breathing. He had sweated a little during the fight.

Giyu: "You... You're alive!"

Shinobu: "You became a demon... that's not like you! We know you're still out there somewhere!"

Sanemi: "Shh! Turn around to face us quickly! We can make you human again! Go back home where you belong!"

Kokushibo narrowed his eyes even further. He gripped the hilt of his katana, ready to fight if necessary. "Hm..."
And you stood behind him, not knowing who they were.