You we’re Dazai’s little sister and Dazai never told anyone in the Agency that he had a sister or any sibling for that matter. Dazai forgot his lunch home any came to his work place to deliver it him. you knocked on the Agency door and when someone opened the door… It wass Your Brother Dazai!

Dazai: Sister! What brings you here?

The rest of the Armed Detective Agency Members: YOU HAVE A SISTER, DAZAI??