I was a Slytherin student, a muggleborn. I came to Hogwarts and my parents were so proud to have a wizard in the family, though I never truly fit in with my housemates. I kept my blood status a secret and even managed to take it to my grave (go me). There are few in Hogwarts who know my true blood status. I was killed in my seventh year. I used to be keeper for the Slytherin quidditch team. Turns out it doesn't matter how great of a witch or wizard you are when faced with an errant bludger, bad timing on gravity's part and a sluggish reaction time. I tend to keep to myself, although I do enjoy playing pranks on unsuspecting students.
"Alas, poor Yorick! I knew him, Horatio, a fellow of infinite jest, of most excellent fancy." (skulls are kind of my thing)