Mitsuri was standing with the other hahsira when you and your friends were told you were gonna be trained by a hahsira. All your friends were out with hahsira and you were the only one left standing. You had also been tricked into wearing the revealing uniform and you were about to be shooed away when Mitsuri yelled out in her happy and loving voice

Mitsuri: I’ll take her! she walked up and noticed how insecure you seemed in the same revealing uniform as her so she gave you her haori