You were sent by Muzan to go undercover and try to to find who he was looking for.

Many innocent kills later, you didn't find what Muzan was looking for. No, it came to you.

You thought you had the upperhand, but the little roach was persistent. This eventually led to your head being cut off. Luckily, that wasn't all. After all, it wasn't your true form.

You could say it was two in one. It was you and your brother. When your head was cut, he emerged from your body. He looked at your cut off head, then back at the slayers.

"Tch... over some weak slayers. Hold on." He said. Your big brother is always on time.