Well, in the original, Harry is very much guided by the values of the wizarding world. However, as a demon lord in fanfiction, he often rebels against those values. His character development may involve him forging his own path, which might not always be a positive one in the eyes of the traditional wizarding community. He could be more self - serving at times, focusing on his own power and survival rather than the greater good of all wizards. Also, his relationships with other characters like Hermione and Ron can change drastically. Instead of relying on them, he may view them as either allies he can use or obstacles in his way.
In the original Harry Potter series, Harry's development is centered around his growth as a wizard and a hero. He is learning spells, making friends, and fighting against evil in a more or less 'good vs. evil' framework. In demon lord fanfiction, his development is much more complex. He is not just a wizard anymore but a being with demon - like powers. His view of good and evil becomes blurred. He may start to question the very foundation of the wizarding world's moral code. His relationships also take a different turn. For example, he may attract followers who are attracted to his new power rather than his noble character. And his enemies are not just the traditional dark wizards but also those in the wizarding establishment who fear his newfound power and the change he represents.
In the fanfiction, Draco might become more independent in his thinking. With Snape's focus on him rather than Harry, he has a different kind of spotlight. This could make him less influenced by the pure - blood supremacy ideas that his family adheres to. He may start to interact more with other houses, especially if Snape encourages it, and develop a more inclusive view of the wizarding world, which is a huge departure from his rather narrow - minded character in the original series.
In the original series, Hedwig is mainly a faithful owl companion. But in fanfiction, she can be much more. She could be a magical entity with her own backstory and motives. For instance, some fanfictions might explore her origin in more detail, like she was bred from a special line of owls with unique abilities.
Harry might be more self - assured. Charlus, being from an older time, could have a more no - nonsense approach to teaching Harry magic. This would make Harry more confident in his abilities. For example, he might not second - guess himself as much as he does in the original story.
Harry could be more independent and self - reliant. Growing up with a Pegasus rather than in a human family means he has to rely on himself and his Pegasus friend more. He would learn to fend for himself at a younger age, which would make him bolder in the face of danger.
When Harry is in Slytherin in fanfiction, his view of the wizarding world may change. He may start to see the grey areas more clearly. Instead of seeing things as simply good or bad, he realizes that there are many factors at play. This makes him more complex as a character. He may also have to deal with the Slytherin legacy of the Dark Arts. He has to navigate through the temptations and warnings related to it. He might study some Dark Arts spells not to use them for evil, but to understand how to defend against them, which is a very different path from what he would have taken in Gryffindor.
In this fanfiction, Harry's development would deviate a lot from the original. His sense of right and wrong would be blurred. Since he's raised by devils, he may not have the same values as the normal Harry. He could be more self - centered, focused on his own survival and power gain rather than the well - being of others. His magical abilities might also develop in a more unorthodox way. Instead of learning the traditional spells for good, he might learn spells that are more harmful or controlling.
He develops a more rebellious streak. In the original, Harry was quite respectful of authority in the wizarding world. But being raised by bikers, he might question rules more often. For example, he might not be as quick to follow Hogwarts' strict regulations.
Well, he might become more confident and self - assured. After all, defeating the most powerful dark wizard of all time is no small feat. He could also be a bit more somber, having seen the true horrors of the dark side up close.
He'd likely be more inquisitive about different forms of magic. Instead of just relying on the spells taught at Hogwarts, he'd constantly seek out new magus - based knowledge.
In the original series, squibs like Filch are more on the sidelines. But in fanfic, they can be the main focus. Fanfic might give them more agency and explore their unfulfilled magical desires more deeply.