Yeah but he is one both sides he wanted to help harry live but instead Voldemort found out and used the crucio curse and killed snape, snape was also a death eater but he liked lily so he didn't want to hurt anyone anymore but he didn't exactly hurt anyone but he did not want voldemort to hurt anyone especially harry,ron,hermione.
Severus Snape was on Peter Pettigrew's "side" for a short amount of time. As you probably know, Snape was a true Death Eater and worker for Voldemort for a short amount of time. Snape was a Death Eater for Voldemort until he found out that Voldemort was after the Potter family. Snape immediately went back to Dumbeldore and asked for forgiveness. From then on Snape became a double agent, meaning he worked for Dumbeldore and Voldemort, he told Voldemort false news about "Dumbeldore's Side" and true news to Dumbeldore. Because Pettigrew was on Voldemort's side for a while, he was on at the same time as Snape, but only for about a month or so.
no. in the 6th snape kills dumbledore. in the 7th, voldemort kills snape and harry kills voldemort
Voldemort didn't know Snape had changed sides, Snape was a spy.
No. Lord Voldemort killed Severus Snape's true love.
Yes. Well, actually, technically, Nagini (Voldemort's giant snake) killed Snape. But Voldemort told the snake to do it.
Because voldemort thinks that snape is the master of the elder wand but he isn't.
Not at all.
Yes and No. Right before the fall of the Potters and Voldemort, Snape switched to being in the service of Dumbledore. After Voldemort fell, Snape was used by Dumbledore to keep a lookout in case of Voldemort's return, as well as to keep an eye on the remaining Death Eaters not in jail. Once Voldemort returned, Dumbledore had Snape serve Voldemort, yet he was to rely the info back to Dumbledore. Snape being a servant of Dumbledore is very easy to miss in the books and the movies. In the Half Blood Prince, when Snape kills Dumbledore, it was due to the fact the Dumbledore had arranged for Snape to kill him, if Harry was to kill Voldemort.
Voldemort kills Snape to get the elder wand
Tobias Snape (Snape's father) or Lilly or I think voldemort
Voldemort killed Snape.
Voldemort ordered his snake, Nagini, to kill Severus Snape.