Rosanna Weasley is Ron Weasley's cousin who is a few months younger, but she's in the same year with him at Hogwarts. Rosanna was adopted by the Weasleys because her parents died in the first war. Rosanna Weasley is a Slytherin. Her aunt and uncle say it doesn't matter, but she knows it does. She knows that especially with You Know Who coming to power and death eaters returning, being a Slytherin will come at a great cost. Not to mention she actually has made friends in the house. Rosanna has found that Slytherins aren't the bad house, a lot of them are normal human beings...