Purple Hair, Black Roots (harry potter x reader)

Y/n spent her whole life with the Malfoys, they raised her. When she came to school she was sorted into Slytherin, just like them. She kept your distance from everybody else, dyed her hair, cut it, and cut off anybody who went to close to her. Why was she so desperate to separate herself from everybody else? Y/n was Sirius Black's daughter, but nobody knew.