You are Mattheo Riddle’s and Tom Riddle’s younger sister. But no one knows it. You’ve been at Castelobruxo in Brazil since first year and only now transferred to Hogwarts after your dad wanted you to. Your mother was Brazilian so you went to Castelobruxo to get to know her life before she met out father. When she was still alive. You took your Mother’s last name and have been living with her sister Valentina (Val for short) until you transferred.