Ganondorf can be a very popular character as well. He is the classic antagonist in the Hyrule series. In linked universe fanfiction, he could be the mastermind behind the new threats that the Links have to face, or perhaps a more complex, redeemed version of himself that adds an interesting twist to the story.
A plot idea might involve the Links having to deal with a rift in the fabric of Hyrule that is causing strange crossovers between different regions and time periods. They would have to find a way to close the rift while also navigating the chaos of these new, merged landscapes.
Link is often a popular character. He might be portrayed as a top student in combat - related classes at the academy, always ready to protect his fellow students.
Sasuke is often very popular in Naruto AU fanfiction. His complex personality and powerful abilities make him a great character to reimagine in different universes. Naruto himself is also a common focus, as writers like to explore different versions of him.
In Avengers alternate universe fanfiction, Steve Rogers is quite popular. He represents the old - fashioned values and strong leadership, which can be a great contrast or a source of conflict in different universes. Thor is also well - liked. Imagining him in different settings, like a more modern or a more magical alternate universe, is really fascinating. Natasha Romanoff is popular too. Her skills as a spy and her complex past can be the basis for many engaging stories in alternate universes.
Yellow Diamond is also quite popular. She represents the power and authority of Homeworld. Fanfictions might focus on her character development, for example, showing a softer side of her or exploring how she came to be so strict in her rule. Her interactions with other Diamonds and her role in the overall hierarchy of Homeworld are interesting aspects to write about.
One of the most popular characters in Naruto parallel universe fanfiction has to be Orochimaru. His thirst for knowledge and his morally grey nature make him a very interesting character to rewrite in different universes. He could be a reformed hero in some fanfictions, using his knowledge for good. Also, Sakura can be popular. In parallel universes, she could have different training methods and develop into a completely different kind of ninja, perhaps one with unique healing or combat abilities that are not seen in the original story.
He - Man is obviously one of the most popular. He's the main hero, so many fanfictions revolve around his adventures, his battles against Skeletor, and his growth as a character. Skeletor is also very popular. His evil nature and his constant scheming make for great plotlines. People like to write about his attempts to take over Castle Grayskull and his interactions with his minions.
Superman is also popular in these fanfictions. The contrast between his god - like powers and Naruto's more hard - earned ninja powers makes for an interesting dynamic. Also, characters like Wonder Woman are popular as they can have interesting interactions with Naruto, especially in terms of their different views on justice and heroism.
Impa is often quite popular. She has a long history in the Zelda franchise and in fanfiction, she can be portrayed as a powerful mentor figure. She might have her own backstories explored, like her training in ancient Hylian martial arts and her relationship with past generations of the royal family.
Well, the 'reunion' trope is quite popular. Characters who were separated in their own universes get to meet in the linked universe, often leading to very emotional scenes. There's also the 'discovery of new powers' trope. As they interact in the linked universe, characters may find they have abilities they didn't know about before. And the 'team - up against a common enemy' trope, where characters who might not have worked together in their original universes join forces to fight a threat in the linked universe.