In many Beast Boy Snaps fanfictions, the villain characters from the original Teen Titans series can also be main characters. For instance, Slade. His menacing presence and his constant attempts to undermine the Titans can create a lot of tension and conflict in the fanfiction. He might target Beast Boy specifically because of his unique powers, or try to use Beast Boy's 'snaps' to his advantage.
Some fanfictions might introduce original characters as main characters. These could be new heroes or villains that are created specifically for the fanfiction. They might interact with Beast Boy in ways that are different from the established characters, bringing new dynamics to the story. For example, a new villain who has the ability to manipulate Beast Boy's emotions, leading to his 'snaps'.
Obi - Wan Kenobi is frequently in Anakin Snaps fanfiction. As Anakin's master, he has a big role to play. Their relationship is often explored, and Obi - Wan's reactions to Anakin's snapping are crucial. Sometimes he tries to bring Anakin back from the brink, while other times he might be the cause, albeit unintentionally, of Anakin's breakdown.
Sometimes, other gods and goddesses make an appearance. Athena might show up to collaborate with Hephaestus on a project. Their interactions can add a lot of depth to the story. For example, they might have different ideas on how to create a new weapon, and their debates and compromises can be really interesting to read about. And of course, there could be a villainous god who tries to steal Hephaestus' secrets related to his snaps.
Well, Mikasa herself is obviously a main character in these fanfictions. Since it's about her snapping, she is at the center of the story most of the time. Eren is also often involved. Given their complex relationship in the original series, his actions or words could be the trigger for Mikasa to snap. Another character that might be involved is Armin. He could be the one who tries to calm Mikasa down or understand what made her snap.
Coco herself is, of course, a main character in most coco fanfiction. She is the center of the story, whether it's about her music career or her family relationships.
Willy Wonka is of course a main character. He is often depicted as an eccentric and brilliant chocolatier with many secrets. The Oompa - Loompas also feature prominently as his helpers in the factory, with their unique songs and personalities.
Obviously, the Wonderbird itself is a main character. Often, there might be a young wizard or witch who befriends the Wonderbird.
The main characters that usually show up in 2moons fanfiction include Dain. His role in the original is quite significant, and in fanfiction, he can be put into different situations. For instance, he could be involved in a mystery that was not part of the original plot. Also, Ronark is often seen, especially when it comes to stories about the leadership and power dynamics within the 2moons world.
Typically, the main characters from the original work on which the 'in a heartbeat' is based are often the main focus in the fanfiction. However, sometimes new characters can be introduced to add more depth or drama to the story.
In some fanfictions, antagonists can also be important in relation to Naruto's mind snapping. For instance, Orochimaru might be interested in Naruto's new state. He could see it as an opportunity to either use Naruto for his own evil plans or study him to gain some new knowledge. So, the villains can have a significant role in the story of Naruto's mind snap.
Harry Potter is often a main character. Since he has a connection to the place through Sirius Black, he's frequently involved in the stories set in 12 Grimmauld Place. His experiences and growth as a wizard can be explored in the context of this spooky old house.