Summary. As a character, Severus Snape was often misunderstood. Many believed he was a villain, and weren't convinced he was actually working for Dumbledore. Snape killed Dumbledore in an effort to protect Draco Malfo and spare him from the emotional trauma of murder.
Despite his attraction to the Dark Arts and Voldemort's ideology of wizard supremacy, Snape's love for Muggle-born Lily Evans, Harry's mother, eventually compelled him to defect from the Death Eaters. He then became a double agent for Albus Dumbledore and the Order of the Phoenix.
Despite Snape killing Dumbledore, it is learned that they had a special agreement for him to do so. When he died, it was revealed that his deep strong love for Lily Evans caused him to redeem himself, joining Dumbledore's cause for her protection (and, after her death, that of her son) from Lord Voldemort.
Why did Albus Dumbledore have to plead with Severus Snape during the Battle of the Lightning-Struck Tower after Draco Malfoy disarmed the late headmaster? Because Dear Albus needed to remind the Half-Blood Prince of his vow to slay Dumbledore in order to save Draco's soul and deny Lord Voldemort the…
So, during the summer between his fifth and sixth years at Hogwarts, Draco Malfoy was tasked with the assassination of Albus Dumbledore to restore his family to Voldemort's good graces. Also at this time, Draco was branded with the Dark Mark.
Firstly, Malfoy almost killed Katie Bell, a seventh year Gryffindor student and Quiddtich player who had been part of the DA. Katie Bell by DoraTheBrit Whilst on a trip to Hogsmeade, Madam Rosmerta (who had been herself under the Imperius Curse by Draco) put Katie under the Imperius Curse to make her…
Snape seems to shift his loyalty between Dumbledore and Voldemort throughout the Harry Potter movies. Only the last film reveals that Snape had always been on the good side. He swore to protect Harry and did Dumbledore's bidding in his war against Voldemort, including infiltrating the Death Eaters.
Snape's strained relationship with Lily, who chose James and allowed him and his clique to bully Snape, further pushed him towards the Death Eaters. Despite his love for Lily, the pain from his adolescence couldn't erase the trauma. Snape's redemption came when Lily was murdered by Voldemort.
Despite the opinions of most others, Albus Dumbledore trusted Snape for reasons that were kept between them both until their deaths. Upon his death, it was revealed that his deep, strong love for Lily Evans caused him to redeem himself, joining Dumbledore's cause at the prospect of her protection from Lord Voldemort.
By Harry Potter and the Deathly Hallows, it's a stretch to call Draco a villain anymore. We just watched — or read — him struggle to reconcile his choices and morals in The Half-Blood Prince. He can no longer justify his actions, and is far more aware of the evil he was born and raised into.
His father was neglectful and sometimes abusive, which may have contributed to Snape's disdain for Muggles. At some point during his school years, he decided to reject his father's name entirely, giving himself the moniker "The Half-Blood Prince" with his mother's maiden name instead.
Dumbledore was dying of a curse set by Voldemort, and only had a few weeks to live. If he died of the curse, that meant Voldemort had killed him and would get the mastery of the Elder Wand. If he killed himself, there was a possibility the Wand would still interpret that as Voldemort's victory.
Snape was so cruel to him all because of the fact that Lily would have survived if the prophecy was about him instead of Harry. NEVILLE HAD NO CONTROL OVER THIS. Harry had come from a home where he was ignored, abused, treated like less than a household pet.
For the second time in Voldemort's life, the unforgivable curse rebounded on him, as the Elder Wand wouldn't kill its master. Since Harry and his friends had already destroyed all of Voldemort's Horcruxes, this finally ended Lord Voldemort's life, with Harry finally defeating the Dark Lord.
Snape's childhood wound, emotional neglect, loss of his best friend, and unrequited love for Lily compounded, and he succumbed to the dark side in Harry Potter. He found himself spying for Lord Voldemort, but all this came to a screeching halt when the Dark Lord marked the Potters for death.
McGonagall later learned that Snape was secretly Harry's protector and had killed Dumbledore at Dumbledore's request. McGonagall then made a controversial decision to add Snape's portrait in the Headmaster's Office as a testament to his bravery.
He promised to protect Draco Malfoy from harm and guide him whilst he attempted to perform the task the Dark Lord had asked him to do: to kill Albus Dumbledore. Snape was actually a double agent working for Dumbledore, who requested Snape to kill him anyway to spare him of a painful and humiliating death.
Since the first Harry Potter movie, Severus Snape was presented as a villainous figure, but once the final installment was released, viewers learned his intentions were never evil — leading to the endless debate over was Snape good or bad.
The Disarming Charm became Harry Potter's signature spell, and it notably caused the final defeat of Lord Voldemort during the Battle of Hogwarts by rebounding his Killing Curse, because the Elder Wand recognised Harry as its master through the spell connection, and thus strengthened the Disarming Charm to the point ...
The movies follow the books closely enough that they aren't really separate universes, except for the fourth movie. There isn't any truly compelling evidence that Snape is Harry's father, because all the points you raise are explained. Snape hated Harry because Harry reminded him of the man who "stole" Lily.
His tears were due to the fact that since the bird had died, he had failed once more to repair the Vanishing Cabinets. Draco needed to repair them in order to give the Death Eaters a safe way to infiltrate Hogwarts. Failure meant death, Voldemort had made that very clear.
Personality. Draco is the prototypical spoiled, rich brat; he believes that his family's wealth and social position gives him the right to bully those poorer than himself, such as Ron Weasley.
Narcissa survived the final battle of the Second Wizarding War and later had a grandson, Scorpius Hyperion Malfoy, through her son's marriage to Astoria Greengrass. However, Narcissa was not too fond of Astoria for her stance on blood tolerance, believing her to be somewhat of a disappointment to the Malfoy lineage.
