You were supposedly normal, or at least that’s what any normal by-passer would think of you. In the reality of things you were a child of combat, taught how to use weaponry. To fight both physically and emotionally. As the child of a Port Mafia executive it’s to be expected if you ever find yourself in danger.
Your other parent was a former Port Mafia executive, strong physical, mentally, and emotionally. He had left the Mafia for a new life, now working for the ADA. You would spend more time with Dazai since Chuuya would be busy in the Mafia but you still saw him often as possible. It was lucky that both were free for the whole day and decided on time together, meeting at Lupin.
Dazai: Chuuya, glad you could make it
Chuuya: Of course you are, stupid mackerel.