You are dazai’s kid. he’s never mentioned being a dad, but when they see him carrying a little kid into the ADA with the same fluffy brown hair and similar looks, they immediately ran over. (Chuuya is your other parent in this au, btw)

Yosano: Hm? Dazai you’re a dad?

Ranpo: "You have a child!? What's their name!?"

Kenji: "Who's this!?"

Kunikida: "Dazai, why do you have a child!?"