He is ashamed of never sticking up for Snape in school and grateful to Snape for making him the Wolfsbane Potion. By the time of the sixth book, he declares that he “neither like[s] nor dislike[s] Severus” (HBP 332), which is probably the best that can be expected after all the bitterness of the past.
He had never intentionally bullied Snape, moreover he occasionally tried to refrain Jame and Sirius from Bullying Snape too.
He was too ashamed to apologize to Snape for what the Marauders did to him in youth even though Remus knew that Snape resented him for it.
Simply put, Professor Severus Snape didn't trust Lupin, thought that he was helping Black into the Castle, and set the essay because he thought someone among the third years would be able to recognize he was a Werewolf.
During his school days and shortly thereafter, he probably hated James the most. He seemed to be the ringleader bully, then married Lily.
Harry also happened to be Snape's least favorite student.
Snape Wouldn't Hate Her So Much
Harry reminded Snape of James, but if Harry had been a girl, he may have reminded Snape of Lily instead. Meaning Snape would have been a lot more eager to protect and help girl Harry throughout the series.
A Professor at Hogwarts School of Witchcraft and Wizardry, Snape is hostile to Harry due to his resemblance to his father James Potter, who bullied Snape during their time together at Hogwarts. As the series progresses, Snape's character becomes more layered and enigmatic.
When James learned what Sirius did, he stopped Snape before he reached the Shrieking Shack, saving his life. Snape, however, had seen Lupin in werewolf form and was sworn to secrecy by Dumbledore.
But Snape didn't have time to get too deeply into that. Later in the year, Dumbledore revealed that Harry was in fact a Horcrux, meaning that he would eventually have to die. Now, as firmly established, Snape was not the greatest fan of Harry, but that didn't mean that he ever stopped loving Lily.
But Lupin was actually in despair, convinced that he could not run the risk of marrying and passing on his lycanthropy to a child. Tonks, convinced that Lupin would never spend time with her again, became desperately unhappy.
The acclaimed author explained that Harry paid tribute to Snape because of "forgiveness and gratitude." Though Snape bullied Harry, he also saved him.
This would bring him into conflict with fanatical Death Eaters like Bellatrix Lestrange later in life, but Snape was almost immediately forgiven by the reborn Voldemort, because he could provide him with thirteen years of information on Dumbledore and the Order of the Phoenix.
Lupin didn't appear to know, given his position in the discussion about trusting Snape. He could have been lying, but that's a bit of a leap. "It isn't our business to know," said Lupin unexpectedly.
As Professor Lupin made to close the door behind him, Snape said, “Leave it open, Lupin. I'd rather not witness this.”… “Possibly no one's warned you, Lupin, but this class contains Neville Longbottom. I would advise you not to entrust him with anything difficult.
However, if there is one aspect that is surprising - but also likely - is that James Potter was also jealous, bitter, and resentful of Snape. These feelings, like Snape's towards James, also likely drove James to bully, harass, and mock Snape, more so than anyone else.
According to the Harry Potter series by J.K. Rowling (Harry Potter and the Prisoner of Azkaban ), Sirius Black played a prank on Severus Snape by telling him how to get past the Whomping Willow so he could see what Remus Lupin and the rest of the Marauders were up to.
Remus John Lupin, 38, was killed May 2, during the Battle of Hogwarts by known Death Eater, Antonin Dolohov.
The potion was brewed for Remus Lupin by Severus Snape to enable him to work as a Professor at Hogwarts without endangering his students.
Although Snape may not have projected his memory of James onto Harry, he still would have been predisposed to dislike him by virtue of him being James Potter's son. Harry being in Slytherin would not have changed this fact.
He doesn't trust Snape as Dumbledore does, but he believes that he can detect any disloyalty. Moreover, Voldemort regards Snape as highly intelligent and therefore ' as a true Slytherin ' a person whose top priority is to take care of himself. To his twisted mind, selfless equals stupid.
Bellatrix Lestrange was in constant competition with Severus Snape for Voldemort's attention. She was jealous of his magical potential and never trusted him. She was always on the lookout for something that would prove Snape's disloyalty to Voldemort.
Most probably not. Snape's hatred of Harry came from having to see James's face every day and Lily's eyes behind his glasses. Harry would've been a constant reminder of the love Snape lost, and I believe it would've been more painful if he was in Slytherin because they'd have to see each other more.
He was also a descendant of Slytherin himself, and could speak parseltongue. These are, of course, obvious signs that he should be placed in Slytherin.