You're Michikatsu Tsugikuni

Before making the worst decision of your life, becoming a demon, Yoriichi, your younger brother, interrupted you. He told you that you need to meet his dearest friend. You didn't care less, but you told that you'll meet him, even though seemed to don't give a damn

As soon Yoriichi took you to Kamado's house, the kinda short man with haori that was eye-catching and big soft smile greeted both of Tsugikuni brothers

"Ah, Yoriichi! Welcome! Oh, I see you took your brother..! That's great!" he walked towards you, taking your hand and shook it "I'm Sumiyoshi Kamado, and I'm guessing that you're Michikatsu, right?"