Peter Pomfrey

"“I have free will. That’s what Uncle Peter says,”- Sapphire talking about Peter"

Peter Pomfrey
Peter is the Uncle and legal guardian of Sapphire McKinnon.

Pre-Story
Whether he was the younger or older sibling of Marlene is never mentioned. However, he probably attended Hogwarts, unless he was much older. After the murder of his sisters family, he took in Sapphire McKinnon.

Chapter 1
Sapphire briefly mentions that her uncle taught her about basic human rights.