Ron Weasley's Patronus, a Jack Russell Terrier, reflects his loyal and protective personality as he is always by Harry and Hermione's side. Ron's bravery is aligned with his Patronus, as Jack Russells are known for their courageous nature, just like Ron who faces his fears.
Fred and George Weasley have the same Patronus shape: A magpie. Rowling revealed on Twitter that the Weasley twins both cast Patronus charms shaped like a magpie, which is a type of bird. "We have a saying about them in the UK, 'one for sorrow, two for joy,' as you might know," she wrote.
I often come across a Harry Potter 'fact' that says Ron and Hermione being soul mates is showcased by Hermione's patronus being an otter and Ron's being a Jack Russell Terrier, an animal known for chasing otters. However, as far as I know, those two animals don't have any interaction in the wild.
Severus Snape's doe Patronus in Harry Potter revealed that he had been in love with Lily Potter and was the one who helped Harry find the Sword of Gryffindor, but its meaning went far deeper than that.
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.
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.
Snape's Patronus, the doe, is understandably unexpected considering the clash in the doe's symbolism and Snape's overall role as a complex villain in the Harry Potter franchise. However, Snape's Patronus is a major indicator of his loyalties and the deepest, darkest parts of him that he'd never reveal: his feelings.
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.
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").
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'.
The fifth year was boring for Sirius. Except for the fact that he had mastered the Patronus Charm, -his patronus was a black German Shepherd, and became an Animagi, -which was the same as his patronus, the fifth year wasn't very interesting.
Neville is one of the only main characters whose Patronus does not take on the form of an animal. He learns how to produce a non-corporeal Patronus along with many other members of Dumbledore's Army during their secret meetings in Harry Potter and the Order of the Phoenix.
Hagrid doesn't have a patronus. It's heartbreaking that one of the biggest animal lovers in the series couldn't conjure up the spell to have a protective charm in animal form. In a tweet, Rowling said that Hagrid couldn't produce a patronus because it's a very difficult spell.
History. 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.
Harry Potter had a few love interests during his time at Hogwarts. Though he eventually settled down with Ginny Weasley, he also had a thing for Cho Chang in his earlier school years. Then, of course, there's his secret love for Draco Malfoy… Wait, what?
Luna married fellow naturalist Rolf Scamander, grandson of Fantastic Beasts and Where to Find Them author Newt Scamander, considerably later in life than Harry, Ron, Hermione, and Ginny, who all married and started families in their early-to-mid twenties.
In the books, Pansy Parkinson has a schoolgirl crush on Draco, and they went together to the Yule Ball. However, there was no true love between them. In the Cursed Child, Draco Malfoy's wife is Astoria Greengrass. Later, after Astoria's death, Draco says that he would “sell [his] soul for another minute with Astoria.”
This snake is also known as the Common European Adder. As you can see, the male adder (see linked photo in tl;dnr) fits well as Tom Marvolo Riddle's / Lord Voldemort's Patronus for a few reasons: Physical resemblance.
If Voldemort were the strongest snake in the patronus list - the largest, most dangerous King Cobra, then it would be fitting for Bellatrix's patronus to also be a Snake of medium size, also venomous and still extremely dangerous. Hence, the Black Mamba Snake Patronus.
The Malfoys are related to the Black family through Narcissa (a first cousin of Sirius Black, Harry's godfather), which makes Draco a nephew of both Bellatrix Lestrange and Andromeda Tonks.
