Bellatrix Lestrange could also be a character who interacts with Snape. If Snape goes back far enough, he might try to influence Bellatrix's path and keep her from becoming such a devoted Death Eater. This could have a major impact on Voldemort's power and the overall balance of the wizarding world.
At the start, Snape would likely be quite suspicious of Naruto. He's used to a world full of secrets and might think Naruto is some sort of threat or spy. Naruto, being Naruto, would keep trying to break through Snape's cold exterior. He might start by complimenting Snape's skills in potions or magic. As time goes on, Snape might see Naruto's good heart and start to open up a bit more. They could end up having some interesting conversations about power, loyalty, and friendship. Naruto could tell Snape about his bonds with his friends in the ninja world, and Snape could share some of his own experiences with the Marauders from his school days.
Well, Harry Potter would likely still be a main character. His relationship with Snape could be even more complex in this fanfiction. Since Snape is a demigod, Harry might be both in awe and a bit scared of him at times.
One interesting plotline could be Snape going back and trying to prevent the death of Lily Potter. He might use his knowledge of the future to change certain events that led to her demise.
Among the students, Hermione Granger - if we consider a scenario where this fanfiction has some sort of time - travel or alternate universe aspect - could interact with Severus. Hermione would be curious about Severus as a girl and might try to learn from her knowledge of potions. And Severus, in turn, could be both annoyed and impressed by Hermione's eagerness and intelligence.
One possibility could be that he has gone into hiding to protect a secret. Maybe he discovered some dark magic plot and has to keep himself away from the wrong people until he can figure out how to stop it.
The love of Severus Snape's life was Lily Evans. He had deep, unwavering love for her since their childhood. His love for her was so strong that it influenced many of his actions throughout his life, even his decisions in the wizarding war.
Yes, in some fanfiction, Severus Snape is depicted as a vampire. Fanfiction allows for creative interpretations of existing characters, and making Snape a vampire can add an interesting and often dark twist to his character.
Hermione would probably be one of the main characters to interact. She might be horrified at first to see Harry in such a situation and would try to find a way to free him. Ron could also be involved, perhaps being more impulsive in his attempts to rescue Harry, which might cause some problems. Dumbledore too would likely play a role. He might have some knowledge about the situation that he's not sharing right away, and his interactions with Severus would be crucial in determining Harry's fate.
Naruto would likely be more powerful in a physical combat sense. His training as a ninja has made him extremely strong, fast, and able to take a lot of damage. He also has the Nine - Tails' chakra at his disposal. But Severus Snape is no slouch. His knowledge of magic is extensive, and he could potentially use magic to outwit Naruto. For example, he could use spells to create illusions or disable Naruto's movements. However, Naruto has shown great adaptability in combat, and his willpower is unrivaled. So overall, Naruto's physical and spiritual power might give him the edge.
They could interact in a mentor - mentee kind of way in certain fanfictions. Snape, with his vast knowledge of potions and the Dark Arts, could end up teaching Ginny something valuable. This would require them to have conversations and work together, which would be an interesting dynamic considering their different houses and personalities.