In some fanfictions, there could be other dark wizards or witches who are allied with Voldemort or have their own reasons for wanting to harm Harry. Snape would have to protect Harry from these various threats as well. For example, some Death Eaters might try to take matters into their own hands and go after Harry without Voldemort's direct orders.
There might also be some within the wizarding community who are jealous of Harry or fear his power. They could try to undermine or harm him, and Snape would step in to protect Harry. These could be people who don't believe in the prophecy about Harry or who simply don't like the attention he gets.
Well, he might use his magic skills. Maybe he creates some protective spells around Harry to keep the werewolf at bay. For example, a strong shielding charm that can withstand the werewolf's attacks.
One reason could be that Snape has his own complex sense of loyalty. He may feel that Dumbledore's plans for Harry are too dangerous or not in Harry's best interest in some ways. He has a long - standing relationship with Harry's mother, Lily, and perhaps through that connection, he wants to safeguard Harry from any harm that might come from Dumbledore's actions or decisions.
In the fanfiction, Snape could protect Harry from Dumbledore by using his skills in potions. For example, he might create a potion that hides Harry's magical signature from Dumbledore's detection. Or he could use his knowledge of the Dark Arts to counter any spells or charms that Dumbledore might use to keep tabs on Harry. Snape is very intelligent and resourceful, so he could find various ways to physically and magically shield Harry from Dumbledore.
One common reason could be his love for Lily. Since Harry is Lily's son, Snape might feel an obligation to protect him out of his undying love for her. It's like he's trying to preserve a part of Lily that still exists in the world through Harry.
In many cases, the main antagonists can be other Slytherins who still hold grudges against Harry or are loyal to the pure - blood supremacist ideology. They might see Harry as a threat to their way of life. Also, some Death Eaters can be antagonists. They target Harry because of his role in Voldemort's downfall and would stop at nothing to get to him.
Perhaps it's out of his sense of duty. He may feel that as a teacher or an elder in the wizarding world, he has a responsibility to protect Harry, regardless of his personal feelings towards him.
Snape could use his position as a double agent to mislead Voldemort about Harry's whereabouts. McGonagall would be more likely to directly defend Harry. She might gather the other teachers and students at Hogwarts to form a united front against Voldemort. Together, they could create a magical shield around Harry, like the one that protected Hogwarts during the battle, using their combined magical power.
Snape's protection in the fanfiction can have a profound impact on Harry's growth. It might give Harry a sense of security that he lacks in the original story. For example, if Snape is constantly shielding Harry from dark magic threats, Harry may grow up more confident and less burdened by the fear of the unknown. He could also learn more about his parents through Snape's stories, which would further shape his identity and self - esteem.
Dumbledore can also be a significant character. He might be the one who arranges for Snape to teach Harry, having some grand plan in mind. He could be observing from the sidelines, guiding Snape's actions and Harry's progress subtly.
Well, in some versions, Snape might use his magic skills and authority within Hogwarts. He could place protective spells around Hermione or keep a watchful eye on her movements, ensuring Draco can't get close to her without his knowledge.