(credit: Harry Potter wiki)
Lily Potter (née Evans) (January 30, 1960 - October 31, 1981) was a Muggle-born witch, the younger daughter of Mr. and Mrs. Evans, the younger sister of Petunia Dursley, wife of James Potter and the mother of Harry Potter. She learned that she was a witch as a child, after a boy who lived nearby, Severus Snape, told her of the existence of the magic. The two became close friends, eagerly discussing the wizarding world, while Lily grew apart from her older sister Petunia. She attended Hogwarts School of Witchcraft and Wizardry from 1971 to 1978 and was sorted into Gryffindor house. A talented student, Lily was a member of the Slug Club and Head Girl in her seventh year. Her friendship with Snape fell apart after he accidentally called her a "Mudblood"; while he would always love her, Lily went on to marry James Potter. She and James both joined the Order of the Phoenix after graduating, and fought in the First Wizarding War, defying Lord Voldemort himself three times. This made their only child the Dark Lord's target when a prophecy was made about the one with the power to defeat him, and Voldemort attacked the Potters on October 31, 1981. After murdering James, he offered Lily a chance to save herself, per Snape's request, if she stepped aside, but Lily refused and was killed for it. This loving sacrifice enabled her son to be the only known person to survive the Killing Curse.