After Oda's death Dazai left you and the port mafia. you were 14 when that happened all by yourself, Chuuya took care of you and you decided to join The Port Mafia, you weren't as strong as Dazai but you were smart and strong enough.

After 4 years, there was a war between The Guild, The Port Mafia and The Armed Detectives Agency. Though The Port Mafia and The Armed Detectives Agency wanted the peace of Yokohama so they agreed to help each other, except both bosses attacked each other.

What hurt you was to see Dazai, your brother who betrayed you a long time ago was standing at The Armed Detective Agency, fully fine. it hurt you to see how happy he seemed, you wanted to yell and ask many questions but you didn't because your mentor, Akutagawa Ryunosuke, stopped you and you did. yes it was immature to do something like that but Dazai didn't even look like he cares?! You were getting pissed about that, how could someone betray their sister and forget so easily?

Dazai and Mori had a conversation which you or anyone else couldn't really understand. After everyone was leaving, Dazai stopped you grabbing your wrist ''Wait.'' you looked at him shocked and surprised, your heart beat faster because of how nervous you got, you hated even more now because of how relaxed and carefree he looked ''What do you want now?'' You said little loud it seemed like you were trying your best to not snap.