Snape
Snape is my friend Marie’s favourite character and it is not hard to deduce as to why. His unrequited love for Lily Potter (nee Evans) which was revealed in my favourite chapter of ‘The Deathly Hallows’ (chapter 33, I believe) is what ultimately saved the wizarding world. The reader learns that Snape had been in love with Lily since they had met as eleven-year-old children. Although she never knew of this love and rejected his friendship after he regretfully called her a ‘Mudblood’, it was his love that had ultimately saved Harry. This was as a result of the fact that upon learning that Voldemort had planned to track the Potters down and murder them all, he went to Voldemort and begged him to save Lily. This what caused Voldemort to ask Lily to step aside; however, for her son, she refused to, choosing death to save the life of her son. The love that Lily had left Harry was so powerful that it overcame the killing curse that Voldemort tried to put on Harry and instead backfired o...