The deer was a reoccurring Patronus within the Potter family: James Potter, his wife Lily, and his son Harry all had deer for Patronuses. James Potter was also an Animagus who could take the form of a large stag.
It was during their stay in the forest that Severus Snape anonymously delivered the Sword of Gryffindor to Harry by placing it inside the frozen lake that resides in the forest and using his Patronus, a doe, to guide him to it.
Who sent the doe Patronus to Harry in Deathly Hallows?
After learning the Trio's general whereabouts from Nigellus, it appears Snape sent the Patronus in the hope that Harry would see and follow it to where Snape hid the Sword in the pond.
Snape's doe Patronus showed that he was on Dumbledore's side and willing to protect Harry. The form of Snape's Patronus proved his acceptance of Lily's choices and regret for his past actions. James, Lily, and Snape all had variations of the same Patronus, symbolizing their roles as protectors in Harry's life.
Why Snape Hid Gryffindor's Sword in an ICY Lake - Harry Potter Explained
Why did Snape and Lily both have a doe?
A doe. And in his final battle with Lord Voldemort, Harry explained the significance of this to his adversary, and to us: 'Snape's Patronus was a doe,' said Harry, 'the same as my mother's, because he loved her for nearly all of his life, from the time when they were children'.
Snape anonymously sent a silver doe into the Forest of Dean to help Harry with his mission in the final book/movie. Since his happiest and most loving memories were with Harry's mother, Lily, his Patronus took the same form as hers — which is what made Harry follow it in the first place.
Notably, Voldemort appeared to be entirely unaware of this split, as he later created a seventh Horcrux in his quest to have six, and continued to target Harry Potter despite him now holding part of Voldemort's own soul.
Summary. Snape's doe Patronus showed that he was on Dumbledore's side and willing to protect Harry. The form of Snape's Patronus proved his acceptance of Lily's choices and regret for his past actions.
James inherited the Cloak from his father, Fleamont Potter, who inherited it as a descendant of Iolanthe Peverell — a granddaughter of Ignotus Peverell. The Cloak passed down through generations of the family until it reached James and then Harry.
As much as people romanticize Snape's infatuation with Lily, the fact she did not love him back romantically is ignored. The fact Snape and Lily were only friends, and she only saw it as such, reveals a lot about his refusal to respect her boundaries.
On confirming Draco's very much alive status, she plainly lied that Harry Potter was "dead". This action of hers was both very crucial and important, not only for Harry's survival but for Voldemort's final defeat as well, thus ensuring Harry was again protected by a mother's love, although indirectly.
The prophecy is mentioned throughout the series, however, it never exclusively mentions that Harry is The Chosen One and suggests Neville was another option. However, one theory explains why, in reality, this wasn't possible.
Family. Snape's family background is mostly shown in flashbacks during the course of the last three novels. Snape was born to Eileen Prince, a witch, and Tobias Snape, a Muggle, making him a half-blood (hence the name, "Half-Blood Prince").
However, Snape's Patronus was less of a counterpart as it was an homage to his true love. It's revealed that his Patronus is a doe simply because he was always in love with Lily. His devotion to her never wavered despite the love being severely unrequited.
In his fifth year James saved Severus Snape from a near-fatal prank that Sirius Black played on him, which involved luring Snape to the Shrieking Shack where Remus Lupin was in his werewolf form. As such, Snape owed James a life debt, although they hated each other.
As the rarest Patronus in the Wizarding World possible, the Albatross represents an enormous bird that flies freely across any sea. This rare Patronus represents those who are simultaneously fearless, optimistic, happy-go-lucky, and ambitious.
In Prisoner of Azkaban, audiences learn that a witch or wizard must think of happy memories in order to conjure a Patronus. Because Snape's Patronus is a doe, it's likely that his happy memories are largely linked to Lily Potter.
Dumbledore knew about Horcruxes. He knew how they were formed, what happened after that, etc. He probably got to know Harry was a Horcrux when he saw the Scar on Harry's forehead, but maybe he wasn't sure.
IT was when Harry and Hermione were on their own without Ron, and were hunting for the Horcruxes, its when Harry used to wake up with terrible headaches in themiddles of the night screaming sometimes. Hermione's research into Horcruxes at that time concluded Harry was Voldermot's Horcrux.
“Look ... at ... me. ...” he whispered. The green eyes found the black, but after a second, something in the depths of the dark pair seemed to vanish, leaving them fixed, blank, and empty. The hand holding Harry thudded to the floor, and Snape moved no more.
Snape was a half-blood. With people like Bellatrix in his house, he had to have heard the purity of his blood questioned at least a few times. His fellow Slytherins did not step up to his defense when he was attacked by two purebloods.
In the heat of the moment, Snape lost control and called Lily the forbidden word. He called her a mud-blood by accident because he was frustrated that lily did not like his closest friends. He did not mean it.
They were not soulmates or anything but Snape really loved Lily, thus his patronus was a doe like Lily's. Lily's never seen casting the Patronus charm in the books or movies but Rowling has revealed that she could produce a corporeal doe Patronus on multiple occasions.
