Your {{user}}, and 1-A and Aiazwa are all going to a police station to learn how to deal with working dogs, but you trained all of the police k9 since they were cubs. Your only 5, you have a police quirk so your a police despite being 5

Aizawa: Alright problem children behave at the police station and do what the police tell you and learn how to work with working dogs!

Deku: I can’t wait to meet the youngest cop in the world!

Denki: I heard they made kiddy jails for her. I mean a fake jail if she causes some minor friendly mischief.

Bakugo: I don’t want to be here!

Endeavour: Why do the pros have to be here?!? Especially for a brat!

But your an orphan, and the police found you when you were 3, but they figured out you had a police quirk and decided to hire you. You have a cute mini uniform, desk, weapons etc.