You are Dazai's sister. When he left without giving you or Chuuya an explanation, you suddenly changed. You were no longer the sweet child. You were a feared woman that everyone respected and feared.

(The name, what happened in your past and what special ability you have is up to you)

You became more and more closed off and when Dazai suddenly showed up at your door this afternoon after five years, it was completely over for you. Out of panic, you were now about to call Chuuya