In some fanfictions, Snape might use his advanced knowledge of potions to create a special concoction to heal Harry. He could draw on his skills in Herbology as well to find rare ingredients for the potion.
Snape could also use magic that he has developed or learned over the years. Maybe he has a spell that can transfer some of his own magical energy to Harry to help him recover from an injury or illness. In many fanfictions, Snape's deep, if hidden, care for Harry drives him to use whatever means necessary to heal him. He might even risk his own well - being or reputation within the wizarding world to ensure Harry's health.
In some fanfictions, Snape might use his advanced knowledge of potions to brew a special healing elixir for Harry. He could also use his magic skills, like a complex spell specifically designed to mend Harry's wounds, whether they are physical or emotional.
Snape could also use his magical abilities in a more emotional sense. He might share his own past traumas with Harry, creating a bond of understanding that starts to heal Harry's broken spirit. By being vulnerable himself, he shows Harry that it's possible to move past pain.
Well, in some fanfictions, Harry might use his advanced magic skills. He could use a combination of powerful healing spells he learned from Hogwarts or perhaps some ancient magic that he discovers. Maybe he has to face some challenges or overcome certain dark forces that were causing the Longbottoms' problems in the first place.
Harry could also outwit Snape by using his quick thinking and ability to improvise. Suppose there is a situation where Snape is trying to catch Harry doing something wrong. Harry might use the chaos around him, like a commotion caused by other students, to his advantage. He could blend in with the situation, making it seem like he's innocent while actually achieving his own goals, like getting access to a restricted area for a noble reason that Snape doesn't initially understand.
As the story progresses, they might start to work together more closely. Snape could be teaching Harry some advanced magic that no one else knows, and through this process, they build a bond. Harry begins to understand Snape's past better and realizes that they have more in common than he thought, like their love for Lily Potter in different ways.
One common scenario is after a battle. Harry is injured, and Snape, despite their differences, steps in to heal him. Maybe it's a fight against the Death Eaters where Harry is seriously wounded, and Snape realizes he has to put aside their enmity for the greater good.
In some fanfictions, yes. Writers often explore the complex relationship between Harry and Snape. They might create scenarios where Harry discovers Snape's true loyalties and motives earlier than in the original books, leading to a new level of trust.
Perhaps in this fanfiction, Snape has proven himself to Harry in some extraordinary way. Maybe he has saved Harry's life multiple times or has shown his true loyalties that were hidden in the original story. It could also be that Snape has some special connection with Harry that makes Harry trust him unconditionally.
The development could also be due to the way the author writes Snape's backstory in the fanfic. If the author delves deeper into Snape's past, his difficult childhood, and his love for Harry's mother, Harry might start to understand Snape better. This understanding leads to admiration as Harry realizes that Snape is not just the strict and seemingly cruel professor he thought he was.
In this kind of fanfiction, Harry often becomes more proficient in potions and other areas that Snape is good at. His relationship with Snape also makes him more empathetic towards Snape's past and the Slytherin house in general. He may not be as quick to judge people based on their house. Also, he might develop a more complex view of the wizarding world's politics, as Snape is deeply involved in some of the darker aspects of it.