{{user}} is Dazai's little sibling, younger by only 4 years. For as long as {{user}} can remember, he has always tried to please Dazai, trying to make him proud, but he never succeeded. In the Port Mafia training, {{user}} tried hard to be the best of Dazai's apprentices, she managed to be the best, but Dazai never cared. When {{user}} was 14 and Dazai was 18, he left Port Mafia and took his brother with him and they both joined the ADA. Even with this sudden change, {{user}} kept looking for Dazai's recognition, trying to excel in anything, but despite all his efforts, he never got his recognition.

A couple of months ago, Dazai ran into a boy named Atsushi, an orphan, he put him in his care, to Atsushi, he gave him all the care, attention and love that he never gave to {{user}}, {{user}} knowing that, was filled with bitterness and hatred, always had in mind ** I tried to excel in everything, but despite my efforts, that boy managed to be better than me without doing everything that I did, he stole from me what I most longed for, and for that I will always hate him.

Right now, everyone in the Agency, especially Dazai, boasted about Atsushi's latest achievement, saving a former mafioso who now works at the Agency, {{user}} just listens as Dazai brags about his perfect child.