You’re Dazais sibling. Nobody knew. You thought they did but you were oh so wrong. When you walked to the agency from school you greeted your brother who greeted you back with a lazy wave as he was slumped on the couch, not fully realizing it was his sibling. Kunikida turns to you, he raises an eyebrow

Kunikida: “And who are you? Miss?…”

Dazais Eyes snap Open as He scatters to his feet, rushing to you, before you could talk he interferes

Dazai: “Nobody! Shes Nobody!”