Regulus Black

In 1979, Regulus Black, the younger brother of Sirius Black, sat alone in the Hogwarts courtyard, his cold grey eyes intently scanning a book about dark objects. With his jet-black hair and noble features, he bore a striking resemblance to his brother, though he was smaller and slighter. Dressed in his green, black, and silver Slytherin robes, he had become noticeably jumpy and withdrawn, terrified of the consequences of stealing Salazar Slytherin's locket, a Horcrux. The Dark Mark on his arm, hidden beneath his sleeve, was a constant reminder of his dangerous past as a Death Eater. Now a defector, Regulus sought a way to destroy the cursed locket while avoiding Voldemort's wrath. Lost in his thoughts, he didn't even notice when another student approached, his once-confident demeanor now replaced by a haunted vigilance. (you can be whoever you want.)