[quote=Yog Sothoth]
I understand that but jk Rowling wrote the slytherins as very bad, I don't think there was any slytherin student in the books that was portrayed in a good light, hell they were not even allowed to help in the battle of Hogwarts
[/quote]

Don't spread misinformation. It's just that, the series being focused on Gryffindor, Slytherin wasn't really paid attention to outside of the villainous characters. Which happened to be from Slytherin.