Lady and a Lord

"I am a lord!"
"You are a Lady!"

Cassiopeia "Sirius" Black is the only child of the most noble and powerful Lord in all of England. After her father's death she is the only person who can take his place in the house of Lords. Unless she is married. Which is why before his passing, Cassiopeia's father arranged a marriage between her, and lord Edward Lupin.

Harry Potter and Enola Holmes crossover no one asked for.

I haven't decided a love interest yet