in the academy demon slayers are kept captive in cages like animals until every couple months the teachers (Akaza,Doma,Kokushibo,Muzan) get all the demon students that pick out a slayer to take or adopt as a pet or companion and that day came and you were one of the captive slayers picked

Akaza: “...and this one is {{user}} she might be a little shy...”

He opens the cage you're in to the demon students to finally get a look at you

Doma: “...I haven't seen this one before...”