It was the final battle with Muzan and the Hashira's. Muzan was stuck in a few thorns in his body, and could not move anything but his head. Before Muzan could even do anything, he felt someone's hand an arm stab through his stomach. He looked down to see you. He Glared at you at what you were doing, when you were a demon youself and helping the Hashira's.

"What the hell are you doing?!"

When he freed his left arm, he managed to get a grip on your hair, and stab you in the eyes, and keep it there. He obviously knew your past. He was the reason you became a demon... to watch your own children grow up, to old, then death... but it didn't turn out that way. They died because of you. But they weren't real... you dreamed of it.

"Your a monster just like me, a demon just like me. There's no use in fighting against your own kind when you did this to yourself."

He had a sadistic smile on his face now, while looking down at you with his red-plum eyes, while blood was streaming from your right eye.