Perhaps Snape is worried because he knows that when Harry hides, it usually means he's up to something that could disrupt the status quo in Hogwarts or the wizarding world at large. Harry has a knack for getting into trouble, and Snape, as a teacher and someone with his own loyalties to navigate, is concerned about the potential fallout. Another factor could be that Snape is secretly trying to protect Harry from other dark forces, and his hiding makes it more difficult for Snape to keep an eye on him.
Well, Snape could be worried because Harry's hiding might be a sign that he's involved in something dangerous related to Voldemort. Snape is in a very tricky position, having to pretend to be on Voldemort's side while also trying to protect Harry. If Harry is hiding, it could mean he's discovered something he shouldn't have or is being hunted by Voldemort's followers. Snape's worry could stem from his fear that Harry might be killed or used as a tool against Dumbledore and the forces of good in the wizarding world.
One reason could be that Snape has a complex relationship with Harry. He might worry about Harry's safety because he has an underlying sense of responsibility towards him, despite their often antagonistic interactions. Also, if Harry is hiding, it could be related to some danger in the wizarding world, and Snape, being in the know about many things, is concerned that Harry's actions could have far - reaching consequences for the overall situation.
In the original series, Snape is often portrayed as a cold and bitter man. In the fanfic, his worry about a hiding Harry might show a softer side that was only hinted at in the books. He still has his sarcastic and somewhat menacing demeanor, but the worry adds a new layer of complexity to his character.
In some fanfics, Snape might punish Harry because of his perceived insolence in class. Harry has a rebellious streak, and Snape, being strict, wouldn't tolerate any behavior that he deems disrespectful to his authority as a teacher.
It could be that Harry demonstrates a great deal of magical talent in a new and unique way in the fanfiction. Snape, being a Potions master and a powerful wizard himself, would be impressed by such talent. Also, if Harry shows an understanding of something that Snape values deeply, like loyalty or sacrifice, it would make Snape have a positive view of him in the fanfiction.
One possible reason could be Snape's long - held grudges and resentments. He has a complex history with Harry's father, James Potter. Snape might see too much of James in Harry and be unable to separate the two, thus rejecting Harry despite any potential father - son connection. Another reason could be Snape's own self - loathing and his belief that he is not worthy or fit to be a father figure. He may think that he would only bring harm or a bad influence to Harry's life.
One possible reason could be that Snape is still holding a grudge against James Potter, Harry's father. He might take out his long - standing anger on Harry. Another reason could be that Snape is trying to discipline Harry in his own strict way, but it ends up being too harsh and making Harry cry.
One possible reason could be that Harry breaks a major rule in the wizarding world within the fanfic. Snape, being a strict and by - the - book person, grounds him as a form of punishment. For example, if Harry uses dark magic without permission, Snape would surely take strict action.
Maybe Harry is under a great deal of stress. He has so many burdens on his young shoulders, like fighting Voldemort, protecting his friends, and dealing with the secrets of his past. Snape has always been a rather intimidating figure to him, but in that moment, the pressure might just be too much, causing him to break down in front of Snape.
Maybe Snape suspects Harry of being involved in some sort of dangerous activity related to the Dark Arts. Pressing him to the wall could be a way to force Harry to come clean about his actions or any knowledge he might have. It could also be that Snape is acting out of his own insecurities and pent - up emotions towards Harry, which he has been suppressing for a long time.
One possible reason could be Snape's unfair treatment of Harry and his friends. Snape often showed blatant favoritism towards Slytherin students and was overly harsh on Gryffindors, especially Harry. This constant bias could lead Harry to want him fired. Another reason might be Snape's connection to the Dark Arts. Harry, having faced Voldemort, might be worried about Snape's knowledge and use of dark magic within Hogwarts. Also, Snape's generally unpleasant demeanor towards students could be a factor. His sarcastic remarks and cold attitude might make Harry think that he is not a suitable teacher for Hogwarts students.
One reason could be to save him. Maybe Harry is injured during a battle or some sort of magical accident, and Snape, despite their differences, steps in to carry him to safety. For example, if Harry is hit by a dark curse and Snape, with his knowledge of dark magic, knows he needs to get Harry to the infirmary quickly.