Who are the common characters in 'Harry Turns Dark' fanfiction?

Well, obviously Harry himself is the central character. But aside from his friends, characters like Draco Malfoy could have a different relationship with Harry. Instead of being just a rival, he could be an ally of sorts in Harry's dark journey, or perhaps he tries to use Harry's newfound darkness for his own gain. Snape too could be important. Given his complex relationship with Harry, he might be in a position where he has to choose between helping Harry return to the light or letting him continue down the dark path.

Obviously Rey herself is the central character. Kylo Ren often plays a role too. In some fanfictions, he might be the one who either tries to stop her from fully turning to the dark side because he has some sort of connection with her, or he might be the one who encourages her to embrace the dark side to be with him.

Voldemort often appears as a sort of 'mentor' figure in some dark path fanfictions. His ideology and power attract characters to the dark side.

Obviously, Harry Potter himself is a central character. Hermione Granger often appears as she has a strong connection to Harry in the original series. Ginny Weasley might also be part of the harem as she was Harry's love interest in the books. Additionally, some original characters created for the fanfiction might be included to add more variety to the harem.

Obviously, Jack Frost is the main character as the story is about his transformation into a dark version of himself. But there could also be other characters from the original Jack Frost lore, such as the Guardians like North, Bunny, and Tooth. They would likely play important roles, either trying to save Jack from his dark path or being forced to oppose him if he becomes too dangerous.

Voldemort is often a key character. Since Harry is going dark, Voldemort might play a role in either guiding him into darkness or being an antagonist to his newfound dark power. Another common character is Hermione. She might try to save Harry from the dark path he's on, leading to a lot of conflict between them.

Snape is a character that could play a major role. Given his past with dark magic, he might be a reluctant mentor to Harry, guiding him in understanding the power and danger of it. Dumbledore, too, would likely be in the story, as he is always concerned about Harry's well - being and actions.

Voldemort could still be a major antagonist, but in a different way. Since Harry is turning to the dark side, Voldemort might see him as a threat to his own power and try to eliminate him. Another could be Dumbledore. If Harry turns dark, Dumbledore would surely oppose him, trying to bring him back to the light. So Dumbledore could be an antagonist from Harry's new dark perspective.

Bellatrix Lestrange can be a significant character in these fanfictions. Since Harry is on a darker path, she might see him as a potential recruit or someone she can manipulate. Sirius Black may also be present, but his role could be one of trying to save Harry from his dark descent, which adds a lot of conflict to the story.

Obviously, the dark prince himself is a central character. There might also be a loyal servant or advisor who is always by his side, like a wise old wizard who tries to guide him. And often, there will be an antagonist, perhaps another prince from a neighboring kingdom who wants to undermine the dark prince.