Audrey isn't the normal girl you'll see outside doing what girls do. Besides having a wonderful past, she actually had the opposite of what you think. Audrey was raised by muggle-borns at the age one and until five, her adoptive parents pasted away but before that they told her her actual childhood.

Five muggles are suddenly sent off to the Wizardry and Witch school when they're actually from another world where no magics were there. It looks like Hogwarts is becoming more interesting as the fives life continues.

The days starts getting less fun since Severus would not bother to argue back, Lily would say the same answer and every girl was still the same, craving for Sirius that was. But one day when a group of girls arrive from a total different school, things started to become more interesting.