Nonetheless, despite her initially benevolent nature, Nagini's blood curse eventually turned her into a snake permanently. Though it is unknown if she became evil as a result of that, or was turned evil as a result of Voldemort turning her into a Horcrux. As a snake, Nagini was completely loyal to Lord Voldemort.
During this time, Voldemort killed a witch called Bertha Jorkins, and J. K. Rowling confirmed it was through her murder that he turned Nagini into a Horcrux. But Nagini was reintroduced in Fantastic Beasts: The Crimes of Grindelwald, which complicated the previous assumption that he'd met her in Albania.
But now we know Nagini was no simple supervillainous pet, but a human woman cursed with the “Maledictus” blood curse, which, according to Rowling, is a female-only inherited condition which grants the affected individual the ability to transform into an animal at will, until one day, the transformation becomes ...
Though it may later be revealed that the Dark Lord did indeed know that Nagini was a Maledictus, there's currently no indication that he (or anyone else) ever thought that she was anything other than a snake who was made into one of the Dark Lord's Horcruxes.
And unlike with Harry, Voldemort did say the spell when he killed Bertha Jorkins to make Nagini a Horcrux. When Voldemort fell at Godric's Hollow, he had split his soul into six parts, and Nagini is to be the seventh to reach his goal. But Voldemort never knew about the Harrycrux.
Voldemort had a special relationship with Nagini, as she was his pet and one of his Horcruxes. According to Dumbledore, Voldemort had strong feelings for Nagini that he had not for anyone else; she was the one living thing that he had ever cared about.
Nagini, Voldemort's snake, then eats Professor Burbage's dead body. A story about her "resignation" from Hogwarts appears in the Prophet, but members of the Order of the Phoenix discount it, as they are unable to locate her anywhere after that. Burbage is later replaced as Muggle Studies teacher by Alecto Carrow.
Erroneously believing Snape is the master of the Elder Wand and that Snape's death will make him the master of the Wand, Voldemort kills Snape by having his pet snake Nagini bite him through ...
Unless one or the other has a significantly smaller role in the films than we are led to believe, Dumbledore and Nagini will get to know each other. From the very little we see of Nagini, it looks like she's at least potentially on the same side as Dumbledore.
In the belief that the Elder Wand will grant its allegiance only to one who has slain its previous owner, Lord Voldemort has his pet snake, Nagini, kill Severus Snape.
When Harry and Hermione are on the first floor of Bathilda's house, Nagini (inside the corpse of Bathilda) tells Harry to "Come!" from the next room in Parseltongue. In reaction, Hermione jumps and clutches Harry's arm, and the two of them obey the command.
At the end of the last film, Grindelwald told Credence he was really Aurelius Dumbledore – the previously unheard of sibling of Albus. However, that wasn't entirely true. While Credence is a Dumbledore, he isn't the brother of Albus, Aberforth and Ariana. In fact, he's Aberforth's secret son!
She was rather cunning and deceptive, and seemed to have understood how humans behaved. The prequel film, Fantasic Beasts and the Crimes of Grindelwald revealed that Nagini herself was originally born as a human before became a snake she is now as result of blood curse.
It wasn't just inanimate objects that could become Horcruxes. Lord Voldemort's beloved snake companion, Nagini, was also transformed into one, and Dumbledore seemed to know it, ominously predicting that a day would come where Voldemort would 'fear for his snake'.
Nagini is loyal to Voldemort because he can speak with snakes. As a Maledictus, there probably isn't much time after the events in The Crimes of Grindelwald before Nagini falls to her blood curse, becoming a snake forever.
He always seemed like he truly loved Nagini. He must have felt something for Nagini or he wouldn't have given her a part of his soul.
J.K. Rowling recently gave more insight into one of the most controversial characters in the Wizarding World: Nagini, who was known only as Voldemort's snake in "Harry Potter," but appears as a woman in the prequel series, "Fantastic Beasts."
Sorcerer's Stone - he speaks to the snake in the cage at the zoo. Chamber of Secrets - he tells Draco's conjured snake not to attack another student. Deathly Hollows - he speaks with Bathilda Bagshot (who is actually Nagini).
Nagini's Future After The Fantastic Beasts Movies
From that point on, she goes to the forests of Albania, presumably to live out the rest of her life as a gargantuan creature, perpetually bound in her scaly form. While in Albania, she's confronted by Voldemort and becomes his most loyal servant.
Snape wasn't prepared for Nagini's attack, like I said, he was waiting for Voldemort to attack. He knew it was his time to die. Maybe that's why he didn't defend himself.
If Snape did defend himself, that would have jeopardized a major part of Dumbledore's and Snape's plan of preventing Voldemort from earning the "allegiance" of the Elder Wand. In the act of defending himself, Snape would have raised Voldemort's suspicions.
In order for Pettigrew to milk Nagini's venom, Voldemort commanded her to let him do so. Peter Pettigrew and Lord Voldemort are the only known people who ever touched the snake. In the films, Nagini is alternately portrayed as a Dumeril's boa or a Reticulated Python.
Charity Burbage floats helplessly above a dinner table, as if paralysed. She begs Snape to help her. Voldemort point his wand at her, and a green light erupts out of its end. The light hits Charity, and she falls down on to the table dead, her eyes open and her face splattered with droplets of blood.
The Deathly Hallows Part I begins with a whole bunch of double-crossing and betrayals. Snape betrays the Order of the Phoenix. A guy from the Ministry of Magic becomes a Death Eater, which is probably how the Ministry ends up falling. And that's just the beginning of the movie.
Isaacs brings up Lucius' disheveled appearance in Deathly Hallows, raising the possibility that the Malfoy patriarch had begun drinking too much. The way Isaacs saw it, Lucius was in a no-win situation. Given everything he'd done, the man no longer had a place on either side of the war.