Ron Weasley could also be in the story. He might be the one providing the more emotional support to Harry. Or, in contrast, he could be jealous of Harry's powers and status, which could create some interesting conflict within their friendship. And of course, there could be villains like Voldemort or his Death Eaters who are the antagonists in the fanfiction.
Obviously, Harry Potter is the main character given the title. His character is likely to be the central focus with his 'godlike' abilities and his independent stance.
In this fanfiction, perhaps the concept of Harry being on 'his own side' means he doesn't fully align with the traditional groups in the Harry Potter universe like the Order of the Phoenix or Hogwarts faculty. He could be making his own decisions based on his own moral code, which could lead to some really different storylines. For instance, he might choose to deal with the Death Eaters in a more unorthodox way.
It's likely that some of the main characters would be students or professors from Durmstrang. Since it's 'godlike', they could be characters who possess extraordinary powers. Maybe there's a young, talented student who is the center of some sort of prophecy or mission. And of course, there could be a powerful professor who guides or opposes this student. It all depends on how the author has developed the story.
Well, Harry Potter is obviously a main character. In this type of fanfiction, he is often the one with the godlike abilities. Then there could be Viktor Krum, who might play a different role than in the original books. Maybe he becomes a rival or an ally to Harry in his journey with his new powers at Durmstrang.
Hermione could be there. She would be really helpful in planning and organizing the island. For example, she might set up a system for categorizing all the magical knowledge and resources on the island.
Most likely, Harry Potter would be one of the main characters. Since it's based on the Harry Potter series, he would probably be central to the story, perhaps leading the fight against the evils of this 'hell' side.
One interesting aspect could be the exploration of Harry's character from a new perspective. In many 'Harry Potter His Own Side' fanfictions, we might see his internal thoughts and feelings in more depth than in the original books. For example, how he really coped with the pressure of being 'the Chosen One' without always showing it to his friends.
Obviously, Harry is the main character. But there could also be his friends like Hermione and Ron. They might play different roles, for example, Hermione could be the one helping Harry understand the more complex aspects of his 'gamer' powers.
In this type of fanfiction, new characters might be introduced as well. There could be other powerful wizards or witches who are either rivals or allies to Harry. Some might be from different magical regions, bringing in new magical cultures and powers. For instance, a powerful wizard from a far - off land who challenges Harry's 'godlike' status. And of course, there are often the antagonists, who are threatened by Harry's power and try to undermine him.
In these fanfictions, the main character with godlike powers is central. Alongside him, the harem often consists of strong - willed female characters from the original series. For instance, Luna Lovegood could be in the harem, with her unique perspective on magic. And there may be a character who is a half - blood or a pure - blood witch from a minor wizarding family, added to bring in new story elements related to the harem and the overall wizarding world.
Dumbledore could be included. Even though Harry is on his own, Dumbledore's wisdom could still be a guiding force, perhaps through memories or some magical means. Also, Hagrid. His knowledge of the magical creatures could come in handy for Harry in his solo adventures. Another character could be Luna. Her unique perspective might inspire Harry when he's facing difficulties alone.