The reason Severus Snape has the same patronus as Lily's is because he was deeply in love with her and the grief and guilt he felt after her death may have cause his patronus to change into a doe, or it already was a doe depending on when he first cast the spell.
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'.
Severus Snape's Patronus was also a doe, which symbolized his love for Lily. Snape uses his doe Patronus to show Dumbledore that he never fell out of love with Lily, his childhood best friend. Warner Bros.
The Patronus of Harry's mother, Lily Evans, took the form of a doe. Lily is never seen casting a Patronus in the "Harry Potter" books or films, but Rowling has noted her ability to produce a corporeal doe Patronus on multiple occasions.
Similarly to Harry, Snape's patronus represents a person. In the memories he gives Harry before his death, Snape shows Dumbledore his patronus, using the form to prove his love of Lily Potter, Harry's mother. This indicates that Lily also had a doe patronus.
1 Albatross
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.
They were close friends, she saw in him someone special that she could care about. But she couldn't be with him. So, it seems like it was very unlikely that Lily ever found out Snape loved her.
James's Animagus form was that of a stag, which earned him his nickname, Prongs. Strikingly, Harry's Patronus was a stag and his mother Lily's was a doe, a female deer, showing that the family's characters were in harmony and formed part of the same animal group.
For the Potter uninitiated, “always” is how Snape explains to Dumbledore in the final book why his Patronus takes the same shape as the one belonging to his long-lost love: Harry Potter's mother, Lily.
"The first thing Snape asks Harry is "Potter! What would I get if I added powdered root of asphodel to an infusion of wormwood?" According to Victorian Flower Language, asphodel is a type of lily meaning 'My regrets follow you to the grave' and wormwood means 'absence' and also typically symbolised bitter sorrow.
The information in this broadcast will prove extremely heartening to Harry, as he learns that he is not alone in fighting Voldemort. It will, however, inadvertently result in the Trio being captured. We learn later that the doe was Severus Snape's Patronus.
In order to conjure the avada kedavra curse, you have to want to kill your victim. We all know that Voldemort could easily kill a child without an ounce of remorse... but not Snape. Snape didn't want to kill Dumbledore, and this was why the spell was blue instead of the usual green.
Because Lily (according to them) had the nerve to not fall in love with her former childhood friend, Severus Snape and marry that no-good-evil-spoiled-rich-brat James Potter.
Dumbledore reveals how thoroughly he loves Harry. Harry is brave, and Dumbledore is proud as any father would be. More than that, Dumbledore succumbs to a parent's weakness; he cares more about Harry's happiness and wellbeing than the wizarding world he is trying to protect.
This nuance was lost on Lord Voldemort, who wrongly assumed Severus Snape held the Elder Wand because he was Dumbledore's killer, when in reality Draco had disarmed Dumbledore before Snape arrived on the scene, making Malfoy the wand's true new owner.
And yet that's a fact that we all often seem to overlook. Draco's mother is Narcissa Black, which makes Draco Sirius' second cousin.
At the end of GOF only a handful of people even know that Sirius is an animagus, let alone his loveable big doggie form. But by the beginning of OOTP we have Lucius Malfoy able to "recognize" Sirius by seeing the large black dog with Harry. So we're left with a good mystery.
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.
“Technically, it's a ferret.” Barty Crouch Jr. may have been completely wrong to transfigure Draco as a punishment, but he was within the same family of what I believe Draco's Animagus form would take, which is the stoat, or ermine.
“A creature I wouldn't want to kiss . . . a spider!” Harry figures out the riddle, and realizes that a spider is about to attack. But what he doesn't realize is what I now believe: that the spider in the maze is Professor Snape, in his Animagus form. It is Spider/Snape who bears down on Cedric and Harry.
They are James Potter, Sirius, Wormtail, Skeeter, McGonagall, Talbott Winger, and an unnamed witch who can turn into a cat. The fact that there are so few Animagi just causes us fans to want to know more about them. After all, they are some of the most unique characters in all of Harry Potter.
The fact that Lily chose James Potter, Harry's father, only fuels Snape's hostility towards Harry.
Severus Snape spent the majority of his life in love with Lily Potter. It is easy to understand why Snape, who had an unhappy homelife as a child, fell hard for the first person to show him love and kindness.
Harry Potter named his son after the character Professor Severus Snape in tribute to him dying for “for Harry out of love for Lily [Potter],”JK Rowling revealed on Friday.