Finch frowned as the girl said "I am Grace Goodspeed Prefect of Hufflepuff and I know what is wong with my sister of the house but I do not know you sir an shall not be relieving my responsibility Elain at this moment.
Gus the robes, please?"

Finch responded
"Miss my name is Markus Finch, I am an Auror, I shouldn't have to explain what that means to a prefect, so I'm going to ask you to please step back and let me take a look at her."