As
He Hurt Young Petunia
During one such interaction between Lily and Snape, he notices Petunia spying on them, and in response to her typically catty remarks upon being called out, Snape causes a branch to fall and hit Petunia on her head.
He was going to say she was only a Muggle. He has already said ”you're a Muggle” to her in a belittling tone the day they first met.
The first one is the fact their initial meeting and resulting relationship was very bad: He jumps out the bushes and calls her younger sister a witch before she recognizes him and judges his appearance. He calls her a muggle dismissively which she also takes as an insult.
Petunia first met Severus Snape during their childhood. She was the sister of Lily Evans, but Petunia was a Muggle, unlike her sister. Snape and Petunia strongly disliked each other, from the first moment they met.
From sisters to strangers
No doubt Petunia would have been saddened by the news of Lily's death but those complicated emotions – grief, regret and unresolved jealousy – were probably buried in the distractions of housework, gossip and pandering to her son Dudley's every whim.
The fan asked the author if Aunt Petunia was a Squib (a non-magical person who is born to at least one magical parent) and Rowling replied: "Good question. No, she is not, she is not a Squib. She is a Muggle.
While Dumbledore said he would protect the Potters, it was on the condition that Snape now worked for him as a double agent. Snape's love for Lily ran so deep that he agreed. When she was still murdered, he reluctantly decided that her death would not be in vain, and that he would protect her son.
Case study 2: Severus Snape
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'.
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.
She made a promise to Dumbledore
One of Petunia Dursley's biggest secrets was the promise she made to Albus Dumbledore. When James and Lily were killed at the hand of Voldemort and Harry was dropped off on the doorstep of 4 Privet Drive, there was a letter accompanying him.
Sectumsempra is a curse invented by Professor Severus Snape, during his childhood, when he was known as "The Half-Blood Prince". He created it with the intention of using it against his enemies, and it soon became one of his specialties.
He said, "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 symbolizes bitter sorrow." If you combined that, Snape's words mean "I bitterly regret Lily's death."
Petunia resented her "freak" sister for being a witch, and was drawn ever-closer into the bland lifestyle of her husband. Vernon struggled to accept that such people existed in his world of order and problems were sparked once introduced to each other.
The fact that Lily chose James Potter, Harry's father, only fuels Snape's hostility towards Harry.
In Harry Potter and the Half-Blood Prince, after Petunia receives a Howler from Dumbledore, she tries to save Harry's life by allowing him to stay at their Privet Drive residence. She goes as far as defying Vernon, who wasn't for this decision.
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.
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.
In the first movie the the scene of the troll you can see that snape has a bleeding leg, why? Snape was bitten by Fluffy the three headed dog. When Troll was released, he went to make sure that no one was after the stone as everyone was distracted by the troll.
As Rowling explained in a series of tweets, Snape loved Harry's mother, Lily, and his unrequited affection drove him to resent Harry's father, James — and by extension, Harry himself.
In the [Deathly Hallows] book, Snape's dying words to Harry were "Look at me". Right then we did not realize the significance of his words but in the very next chapter when Harry goes through Snape's memories in the Pensieve, he comes to know how much Snape loved Lily.
The movies show a scene where Snape went to Dumbledore begging him to protect the Potters because Voldemort was after Harry and his parents due to the prophecy. Yes, Dumbledore knew that Severus had loved Lily when they were in school together and for some time after.
Her last line there is, "You didn't just lose a mother that night in Godric's Hollow, you know. I lost a sister." Since Aunt Petunia usually prefers not to acknowledge Harry's mother at all, it's a surprisingly sweet moment. In the book, she uses her last words to say "Well — goodbye" to Harry.
Figg is a Squib and a member of the Order of the Phoenix. Apparently, she was stationed to live near Harry in order to keep an eye on him and the Dursleys.
It is a specifically a school of magic, and Petunia had none. Imagine if Dumbledore had somehow let her in. Her life would be miserable, and she wouldn't really be able to participate in most classes.