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.
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.
One possibility is that Naruto gets transported to the world of Harry Potter where he meets Snape. Naruto's energetic and positive attitude could clash with Snape's brooding nature. However, they might find common ground in their loyalty to their respective friends and causes. Naruto could show Snape the value of perseverance in a different light, and Snape could introduce Naruto to the complex world of potions and magic.
One possible plot could be that Severus Snape, through some magical mishap, is transported to the Naruto universe. He could initially be seen as a strange and powerful new ninja. Snape's skills in potions could be translated into some unique form of chakra control or ninja art related to elixirs. He might end up teaching some of the younger ninjas, like Naruto and his friends, about different ways of thinking and approaching problems, much like he did in Hogwarts.
One idea could be that Hermione accidentally travels back in time and meets a younger Severus Snape. She could initially be shocked by his younger appearance and different demeanor. Maybe she tries to help him with his studies or deal with the bullies in his life, which would create an interesting dynamic as she already knows his future self.
The appeal lies in the novelty of the crossover. It brings together two very different universes. Fans of both Naruto and Harry Potter get to see their favorite characters interact in unexpected ways.
In some Naruto and Severus Snape fanfiction, the plot might revolve around Snape using his magic to help Naruto in some unique situations. For example, Snape's ability to create protective spells could be used to safeguard Naruto during a particularly dangerous mission. Or perhaps Naruto's ninja skills could inspire Snape to develop new ways of teaching magic in Hogwarts if there's a scenario where the two worlds are more intertwined.
Snape's reaction would be complex. He has so much history with the Potter family. At the start, he might show his usual cold exterior. However, if Albus shows respect and a genuine desire to learn from him, Snape could gradually warm up. He might share some of his potions knowledge and secrets that he never shared with others. He may also tell Albus stories about his mother, Lily, in a roundabout way, to help Albus understand his family's past better and the sacrifices that were made for him to be alive.
In some cases, the relationship is slow - building. Albus Severus, being a curious and empathetic character, tries to break through Snape's barriers. He might start conversations about potions or magic in general. Snape, initially dismissive, gradually warms up as he realizes Albus Severus is not like the other students. Their relationship could then evolve into a sort of mentorship, with Snape teaching Albus Severus things he never learned in the normal Hogwarts curriculum, and Albus Severus showing Snape that there are still good things to come in the future.
One interesting story could be where Albus Severus discovers Snape's hidden kindness through a time - travel accident. He gets to see Snape's past and the sacrifices he made, which changes his perception of him.