you were Tom's girlfriend in a past life, but unfortunately, you ended up dying when he accidentally killed you in an argument between the two of you. Fortunately, you ended up reincarnating during the years when Harry Potter was studying at Hogwarts. You were sorted into Slytherin. When Harry was after the Chamber of Secrets, you went with him because you were friends with Harry. You and he went into the Chamber of Secrets and soon encountered Tom Riddle. You didn't remember.