One possible reason could be a dark wizard's plot. Maybe a powerful dark wizard wanted to use Harry against the Weasley family or the entire wizarding community, so they managed to take him. Another reason might be some kind of magical accident or curse that caused Harry to be removed from the Weasley family environment.
Perhaps there was a misinterpretation of a prophecy. In the wizarding world, prophecies often play a big role. If there was a prophecy related to Harry that was misread, it could lead to the situation where he was taken from the Weasley family. For example, if the prophecy was thought to put the Weasleys in danger because of Harry, someone might have taken him away to protect the Weasleys.
It would surely strain his relationship with Ron. Ron, being a Weasley, would be deeply affected. He might feel betrayed that Harry was taken away from his family. And for Hermione, she would be worried about Harry and try to figure out what happened. Their friendship triangle would be shaken.
One possible reason could be a plot by some dark forces to gain an advantage over Harry. Maybe they thought by separating him from his father, they could manipulate him more easily later on. Another reason might be related to some ancient prophecy. In the wizarding world, prophecies often drive actions, and perhaps this was seen as a necessary step to either protect or use Harry in relation to the prophecy.
One possible reason could be that Harry is preoccupied with his own dark thoughts or problems. Maybe he's worried about Voldemort and his plans, and in his distracted state, he unconsciously ignores Mrs. Weasley's attempts to reach out. Another reason might be that he's trying to be independent. After years of being in the wizarding world on his own terms, he might not want to be mothered too much by Mrs. Weasley.
One possibility could be that in this fanfiction, Snape takes Harry for some sort of training or protection. Maybe Snape realizes that Harry is in greater danger than Dumbledore anticipates and decides to take matters into his own hands. He might take Harry to a secret location to teach him advanced magic or to keep him away from the prying eyes of Voldemort's followers.
It might be due to a self - sacrificing decision on Harry's part. He could believe that by leaving, he would protect the Weasleys from the dark forces that are constantly after him. Since he has so many enemies, he might think that as long as he is around the Weasleys, they are in danger.
One possible reason could be as a form of humiliation. His enemies might take his glasses to make him feel vulnerable and less in control. Without his glasses, Harry is severely visually impaired, so it's a way to undermine his confidence.
In some fanfictions, Ginny might be written to betray Harry because of a prophecy. The prophecy could mislead her into thinking that Harry was going to bring doom, and so she decides to act against him to prevent that. It's a different way of looking at their relationship compared to the original story, where their bond was based on love and trust.
One possible reason could be a lack of attention in the marriage. If the husband is always busy at work and neglects his wife's emotional needs, the wife might be more vulnerable to the so - called 'attention' from a friend.
Yes, there might be. The 'Taken King' is from the Destiny universe and combining it with Harry Potter in a fanfiction could be a very creative and out - of - the - box idea. There are many fans out there who like to cross - over different fictional universes in their fan - created works.
It could be that Harry, through his kind heart, comes to understand Severus's complex past and motives. He realizes that Severus is not all bad and that there is a deeper connection between them. This new - found understanding and emotional bond drives Harry to save Severus from harm.