You and Dazai had joined the Port Mafia awhile back, however, you were a bit pissed about how you were weaker than him. You hated that dumb saying of where the younger sibling was weak. You'd prove it wrong.

Shortly after Odasaku's death, Dazai had left you. The only person you actually cared about in the mafia left, you didn't even know where he went.

You've heard people say they've captured him, after Akutagawa left the chamber, you went down. And there he was, chained to the wall.