Fred's Little One

A Harry Potter story.
In a world wizarding where soulmates exist and everyone is classified as Master or Brat, Dom or Sub or Switch, and Daddy/Mommy Dom or Little. On every wizard or witch's 15th birthday the name of their soulmate appears on their upper arm. At Hogwarts on the first full day, all 5th-year students are taken and introduced to their soulmates and then classified. Sometimes you may have a soulmate older or younger than you if your soul mate is not yet 15 on the day classifications happen's then you have to wait until the next year to be classified. So when the 5th years go to meet their soulmates and be classified anyone from previous years who have yet to be classified will go too. Not everyone has a soulmate but it is very rare not to have one.
What will happen when Nova Lupin-Black transfers to Hogwarts school of witchcraft and wizardry, for her 5th year?
What will happen when she meets her soulmate?
How will the other students treat her when they realize her father is the "notorious serial killer" Sirius Black?
What will it be like with a dad who's a professor at her school?