賽佛勒斯·石內卜
Severus Snape, a member of the Order of the Phoenix, meets with Narcissa Malfoy, Draco's mother, and her sister Bellatrix Lestrange, Lord Voldemort's supporter. Narcissa expresses concern that her son might not survive a mission given to him by Voldemort. Snape makes an Unbreakable Vow with Narcissa, swearing to assist Draco.