In some Dark Ben 10 fanfictions, Eon could be paired with Dark Ben. Eon has his own time - related powers and motives. If he teams up with Dark Ben, they could create chaos across different timelines. Also, Rook might be involved. He might be tasked with stopping Dark Ben, but as the story progresses, they could develop a more complex relationship, like Rook starting to understand Dark Ben's motives and trying to find a way to redeem him.
Gwen is often paired with Dark Ben in fanfiction. Their dynamic can be really interesting as she tries to bring out the good in him or stop his evil plans. Another character is Kevin. He might team up with Dark Ben for a while, either because they have a common enemy or Kevin thinks he can control Dark Ben's actions.
Lee Everett is often paired with Ben. Since Lee is a central character in the game, his relationship with Ben can be explored in many ways, like a mentor - mentee relationship or a friendship based on mutual survival.
Princess Peach is often paired with Dark Mario in fanfiction. Their relationship can be very different from the normal one. Instead of being the damsel in distress, Peach might be a more complex character, perhaps even having a dark side herself and being in a sort of power struggle with Dark Mario. Another character is Luigi. He could be either trying to save his brother from the darkness or be in direct conflict with Dark Mario as he tries to protect the Mushroom Kingdom.
Pepper Potts is often paired with Dark Tony in fanfiction. Their relationship can take on a whole new dynamic as Pepper tries to deal with this darker version of Tony. Another character could be Rhodey. He might be in the story trying to bring his friend back from the dark side. And sometimes, even villains like Loki could be paired with Dark Tony in some really out - there fanfictions.
Vlad Masters is often paired with Dark Danny. Since they both have a connection to Danny's ghostly side, they can have some really intense interactions. It could be a power struggle between them or an alliance of sorts.
Sometimes, fictional characters from political dramas might be paired with him. For example, a character like Frank Underwood from 'House of Cards' could be put in a situation with Ben Shapiro. This would create an interesting dynamic as their approaches to politics are quite different, with Shapiro being more about traditional conservative values and Underwood being a Machiavellian character.
In some fanfictions, 'dark side Luke' might be paired with Palpatine. Palpatine, as a master manipulator, could have a role in Luke's fall to the dark side, and their partnership would be full of political intrigue and dark Force - related activities. Palpatine could use Luke as a tool to further his own evil plans, while Luke might be seeking more power from Palpatine.
Mikasa is often paired with Dark Eren. Given their long - standing relationship in the original series, it's natural for fanfiction to explore how she reacts to his darker side. She might try to bring him back to the light or be conflicted about her feelings for him.
Naruto can also be paired with Dark Kakashi. Naruto's unwavering belief in the good of people could contrast sharply with Kakashi's darker self. It might lead to situations where Naruto tries to bring back the old, more positive Kakashi, and through their interactions, both characters grow and learn more about themselves.
Ben Tennyson as a baby is definitely a main character. He's usually the center of the action, whether it's him trying to figure out his powers in a babyish way or just getting into cute little scrapes. Gwen as a baby also often appears. Their relationship as baby cousins can be explored in different ways, like having little spats or being really protective of each other.
Gwen Tennyson is often paired with Ben 10000. Since they are related in the original series, it's interesting to see how their relationship might be different in a crossover scenario. Maybe they have to work together to save the universe in a more complex way than before.