Sirius and Harry had a kinship. He regarded Harry as his own family, and his love for Harry was based on family feelings and the deep feelings of missing Harry's parents. He longed to live with Harry and give him the warmth of a family. Snape's feelings for Harry were even more complicated. He loved Harry's mother, Lily, and his love for Lily extended to protect Harry. Although he appeared to be strict and even harsh to Harry, he had always been secretly protecting Harry. This was a responsibility and protection that stemmed from his deep affection for Lily. It was difficult to simply compare Sirius's love for Harry with Snape's. Their love for Harry had different origins and manifestations. Sirius's love was more of a direct familial concern, while Snape's love was hidden under the stern appearance, and more of a guardian derived from his persistent love for Lily. Harry Potter and the Order of the Phoenix is not enough. Please click to read the novel!
Snape and Sirius had many complicated connections in the Harry Potter series. Sirius was James Potter's best friend and Harry Potter's godfather. Snape and James Potter had conflicts during their student days, and this conflict extended to Sirius. At the end of Harry's third year in the Shrieking Shack, Sirius had been deemed dangerous, and Snape had rushed into the Shrieking Shack, worried that he might hurt Harry. Although it was later proven that Sirius was innocent, this episode showed the tension and rivalry between them. The two of them belonged to different camps. Sirius was a member of the Order of the Phoenix and was on the side of justice against Voldemort. Although Snape ultimately stood on the side of fighting against Voldemort, he had followed Voldemort and his complicated identity and behavior caused a deep misunderstanding and contradiction between him and Sirius. Harry Potter and the Goblet of Fire was not enough. Everyone, please click to read the novel!
The 'Harry Potter' series is a family - friendly and widely loved story. Snape and Sirius have their own complex relationships within the plot, which are centered around things like loyalty to different sides, their history with Harry's parents, and the fight against Voldemort. There is no place for inappropriate content like that in the official story.
Snape might be secretly pleased at first, seeing as he has no love for Sirius. But then, being a teacher, he'd probably feel obliged to report it. He also might use this situation to his advantage against Sirius in the wizarding politics within Hogwarts.
From the information provided, there were many contradictions and oppositions between Sirius and Snape. Sirius, who had been accused of betraying Harry's parents and killing Pettigrew, had become a major threat to Harry in his third year. Snape had always held a grudge against Harry's father, James Potter, and Harry's resemblance to James made Snape loathe Harry as well. Sirius was Harry's godfather and cared about Harry, but Snape saw more in Harry's eyes than in James's. This contradiction was more apparent in the incident in the Shrieking Shack at the end of Harry's third year. Snape was worried that Sirius would hurt Harry, and although Sirius was innocent, he and Snape were at odds under the circumstances. Their relationship was complicated and full of hostility, which stemmed from past grudges, different attitudes towards Harry, and personal loathing. Harry Potter and the Goblet of Fire was not enough. Everyone, please click to read the novel!
In the 'Harry Potter' series, Snape and Sirius Black are adversaries. Their relationship is rooted in their school days. James Potter was Sirius's best friend, and they both harassed Snape during their Hogwarts years. Later, Snape's allegiance to Dumbledore and Sirius's membership in the Order of the Phoenix didn't ease the tension. They were constantly at odds, with Snape often seeing Sirius as a threat to Harry, and Sirius having little respect for Snape due to their past.
Snape and Sirius' relationship is one filled with animosity and mistrust. Snape resented Sirius for his role in the bullying he endured at Hogwarts. Sirius, on the other hand, saw Snape as a former Death Eater and a potential threat. Their relationship is also influenced by their different loyalties. Snape is loyal to Dumbledore and his own mission to bring down Voldemort, while Sirius is loyal to the Order and to protecting Harry. Their interactions are often tense and full of underlying hostilities.
In some fanfics, Snape might help by using his knowledge of the situation. He could provide crucial information that clears Harry's name. Maybe he has some insights into Sirius' situation or the events that led to Remus blaming Harry that others don't have, and he decides to share that information to set things right.
I haven't come across a 'snape is sirius slave' fanfiction myself. Fanfiction themes can be very diverse, but this one seems rather unorthodox and might not be as common. However, the world of fanfiction is vast, and new works are being created all the time, so it's possible that someone has written it, but it may be difficult to find.
Snape and Sirius had been enemies since their school days. Sirius's impulsiveness had almost caused Snape's death in werewolf form, but it was James 'timely arrival that saved Snape's life, which had made Snape hate Sirius. And Sirius persuaded James to change the Secret Keeper, indirectly leading to Lily's death, which also deepened Snape's hatred for him. Snape had often retaliated by taunting and provoking Sirius. Harry Potter and the Goblet of Fire was not enough. Everyone, please click to read the novel!
In some fanfictions, Sirius might be portrayed as delusional about Snape due to their long - standing enmity in the original story. Sirius has always suspected Snape of being a Death Eater, and this suspicion could be exaggerated in fanfiction, making him seem delusional.