A doe. And in his final battle with Lord Voldemort,
Snape's Patronus is a Doe because of his outstanding love for Lily Evans, the mother of Harry Potter. Snape met Lily when they were children and immediately developed a crush on her. However, Lily also harbored intense feelings for James Potter, and ultimately, she fell in love with James over Snape.
So, when it comes to the pair having the same Patronus, we want you to know that it's all because of love. If you recall, "The Prince's Tale" chapter of Harry Potter and the Deathly Hallows virtually confirms that Snape's unrequited love for Lily influenced the shape of his Patronus.
It was only through his encounter with Lily, his love for her grew that he began to cherish their happy moments and was able to eventually produce his patronus. The doe patronus is his original patronus. If he didn't meet Lily, he would be like all the other Death Eaters, incapable of casting a patronus.
In Deathly Hallows, it is never shown that Snape saved Harry and Sirius during the third year. Snape's patronous is shown to be a doe. Harry's is a stag. In the Deathly Hallows, Snape's patronous is shown to be leading Harry to the sword of Gryffindor in the Dean's forest.
Now, as firmly established, Snape was not the greatest fan of Harry, but that didn't mean that he ever stopped loving Lily. Dumbledore was surprised that Snape seemed to care for the boy. With a swish of his wand, Snape conjured up a Patronus – Lily's Patronus, a doe. 'Always,' he said.
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.
The albatross is the rarest Patronus on our list; the one belonging to the lowest number of Wizarding World fans. With the longest wingspan of any bird – up to 11 feet – the albatross surfs the ocean winds for hours, hardly even needing to flap.
Lily brought light and warmth into Snape's life from the moment they met. He was an isolated, lonely child whose magic would have only made him more of an outsider in his hometown of Cokeworth.
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.
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.
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.
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.
Voldemort intentionally made six Horcruxes, but when he used Avada Kedavra on Harry, he unintentionally created a seventh Horcrux. Instead of dying, Lily's love for Harry created a counter 'curse' known as Sacrificial Protection and saved Harry.
It said her true patronus was a doe, but she couldn't have it because Snape did. So after the final battle when she cast one it was a doe to match Harry's stag.
The fact that Lily chose James Potter, Harry's father, only fuels Snape's hostility towards Harry. Snape's character has been widely acclaimed by readers and critics. Rowling described him as "a gift of a character" whose story she had known since the first book.
Her leaving Snape wasn't a sign of her being a bad friend but rather that their interests no longer clashed as he was studying something that Lily despised. They just grew apart over time, and that was no fault of Lily's.
What is Voldemort's patronus? The natural thought would be that Voldemort's patronus would be a snake. But, that's not true, Voldemort would be incapable of producing a patronus. Dementors are Voldemort's allies, he and his death eaters don't need patronuses to keep them at bay.
"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.
Snape having the same Patronus, the doe, as Lily symbolized his everlasting love and unwavering devotion towards her. He hadn't stopped loving her after their last altercation, marriage to James Potter, or death. She was his "always," his guiding light, and he protected Harry for her.
In the case of Snape. he was Sorted into Slytherin because he was ambitious, leaning towards the Dark Arts, his mother was one, AND he had an anti-Muggle bias, same as Salazar Slytherin himself.