Summary
Not all Slytherins are Death Eaters. Most aren't, in fact. And many Slytherins are just as brave as Griffindors. Our narrator, one such Slytherin, relates a tale of being in a group of anti-Voldemort Slytherins, explaining why there were no Slytherins in Dumbledore's Army, and where they were during the final Battle of Hogwarts.