After the fall of the ministry, the death eaters would have discovered that Dumbledore intended for the sword to go to harry in his will - so Snape was ordered to hand it over to Bellatrix for protection. Snape gave them a fake and found a way to get the real one to harry.
When Ginny Weasley, Neville Longbottom, and Luna Lovegood tried to steal the sword from the Headmaster's office, Snape gave the Sword of Gryffindor to Bellatrix Lestrange for safe keeping. Bellatrix hid the sword at Gringotts, alongside other important artifacts: mainly, the Cup of Hufflepuff.
The group was caught and punished as a result. Following that incident, Severus Snape passed the counterfeit sword to Bellatrix Lestrange. Bellatrix then stored it in her Gringotts vault alongside Helga Hufflepuff's cup, one of Voldemort's Horcruxes.
As far as readers and viewers know, Snape was the only Death Eater to cast a Patronus spell throughout the series. Snape anonymously sent a silver doe into the Forest of Dean to help Harry with his mission in the final book/movie.
When Harry is in the forest, the doe appears to guide Harry to the Sword of Gryffindor – the object which is needed to destroy one of Voldemort's Horcruxes. Harry is perplexed by the appearance of the doe, which was also the Patronus that belonged to his mother - Lily Potter.
Why Did Snape NEED to Give Gryffindor's Sword to Bellatrix? - Harry Potter Explained
Was it Snape's Patronus that saved Harry?
With Harry and Hermione despondent after the events in Godric's Hollow and Ron trying desperately to find his way back to them, it was Snape's Patronus – the Silver Doe that was somehow familiar to Harry, perhaps because it recalled his mother's own Patronus – that brought them back together.
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'.
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.
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").
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.
Honestly, Hermione knew Dobby was a lost case... nothing could have revived Dobby after the attack or she would have definitely helped Harry with Dobby considering she was the girl who started S.P.E.W(Society for the Elfish welfare) and fought for elf rights. There was nothing to be done at that point.
It is assumed Bellatrix was at least initially drawn to Lord Voldemort because they both believe in an ideology that favors pure-blood wizards and witches over other members of the community. This elitism, shared by the Malfoy and Lestrange clans, was instilled in Bellatrix since childhood.
Bellatrix was one of Voldemort's cruelest Death Eaters, always eager to inflict the Cruciatus Curse on enemies. Harry Potter noted that she was as "mad as her master". Probably because of these similarities, Bellatrix was slavishly devoted to Lord Voldemort and was ready to do whatever was necessary for his cause.
They know she's an impostor. They've been warned", so obviously the request for the wand was unexpected even to him. It's thus pretty safe to conclude that the real Bellatrix had reported her wand stolen and alerted Gringotts prior to the trio's attempted break in.
Did Bellatrix know she had a horcrux in her vault?
At some point in time, Lord Voldemort gave Bellatrix Lestrange Hufflepuff's Cup, one of his Horcruxes, to keep safe in her vault, though he didn't tell her its true nature.
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.
Although he wasn't turned into a werewolf, he did develop some wolfish tendencies such as a liking for very rare steaks. He married Fleur on 1 August 1997, although their wedding was disrupted by the arrival of Death Eaters following the fall of the Ministry of Magic.
The Potters' generational wealth is traced back to their ancestor, Linfred of Stinchcombe, who amassed a great fortune through his medicinal services and inventions of healing potions.
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.
It is known that Harry is a descendant of Ignotus Peverell (The brother that received the Invisibility Cloak), and Voldemort is descended from Cadmus Peverell (The brother that received the Resurrection Stone).
J.K. Rowling says Draco doesn't have a patronus because he never learned the spell but I think it's because he doesn't have any powerful happy memories to use.
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.
