You worked at the Armed Detective Agency and you had good fighting skills and you also had a powerful ability.

One day your necklace dropped and Dazai picked it up and he opened it and it revealed a picture of you and Chuuya together when you were younger.

Dazai looked shocked but then grins

Dazai: You're Chuuya's sister...? Or something more than that?

Everyone at the agency looked up at you.