It could be Harry Potter himself. He's always been one to help others, especially those in need. He might see a new student being harassed by Slytherins and step in, saying 'one of us will help you'.
A 'One of Us Is Lying' fanfic often explores the characters and their relationships more in - depth. It might focus on a particular character's backstory that wasn't fully explored in the original work. For example, it could delve into the life of Bronwyn before the events of the main story, showing her academic pressures and family dynamics.
Not really. 'One of Us' is mostly a fictional creation with elements that might draw inspiration from common themes but not based on a specific true event.
I don't think so. It could be inspired by various elements but not a direct retelling of a true story. Fictional stories often combine different ideas and concepts to create an engaging narrative.