In this fanfiction, Benhypno in human form could be on a quest to find a way to permanently stay in that form. He teams up with some human friends who are initially skeptical of him but eventually come to trust him. Along the way, they encounter various challenges and enemies. He might also discover new powers or abilities that are unique to his human form, which help them in their journey.
Well, it might be about Benhypno falling in love in his human form. He meets a girl who he really likes, but he's constantly worried about revealing his true self. He has to balance his feelings for her with the fear of her rejecting him if she knew he was actually Benhypno. There could also be some action scenes where he has to protect her from other villains using his powers subtly.
The plot could involve Benhypno trying to adapt to human society. Maybe he has to go to school and deal with normal teenage problems while hiding his true identity. He could struggle with making friends at first because of his unique background, but then gradually learn to fit in and use his powers in secret to help those in need.
One possibility could be that Benhypno in human form tries to blend into normal human society. He might struggle with understanding basic human emotions at first. For example, he could be confused by the concept of friendship and loyalty among humans. He might also have to deal with the fact that he has powers that he has to keep hidden from others, which could lead to some comical situations where he almost reveals himself accidentally.
One big challenge for Benhypno in human form would be dealing with his memories and instincts from his alien self. He might have flashbacks or urges to act in an alien way when he's in a tense situation. For example, if he's in a fight, his first instinct might be to use his full alien powers, which he can't do without revealing himself. Also, he may face the challenge of making friends. Since he has a different background, he may find it hard to relate to normal human teenagers and their interests.
He could develop more empathy towards humans. Since he's in human form, he gets to experience life from their perspective. This could make him more understanding and less likely to use his powers recklessly.
Maybe in the fanfiction, Esther gets into trouble while exploring a dangerous part of the Omniverse. Ben discovers her plight and decides to rescue her. As he does, they find themselves in a situation where they are trapped and have to rely on each other to escape. During this time, they share their hopes, dreams, and fears. Ben realizes that Esther is more than just a friend, and Esther sees Ben in a new light. Their relationship blossoms from there, with them having adventures together and supporting each other in the Omniverse.
One possible fanfiction could be about Ben and Kai going on a new adventure in the Omniverse. Maybe they discover a new alien species that is causing chaos in a far - flung galaxy. Ben uses his Omnitrix to transform into different aliens to try and stop the threat, while Kai uses her martial arts skills to fight alongside him.
One possible plot could be that Esther gets caught up in an alien conspiracy in the Omniverse. Ben, being the hero, steps in to save her. As they work together to uncover the truth behind the conspiracy, they start to fall for each other.
Well, in a 'Ben 10 Omniverse Ben x Kai' fanfic, perhaps it could start with Kai joining Ben on one of his inter - dimensional adventures. Along the way, they encounter various challenges that test their relationship. Ben might use his Omnitrix in creative ways to protect Kai, and in the process, they realize their mutual attraction. For example, when they are trapped in a strange alien world, Ben has to transform into different aliens to find a way out while also keeping Kai safe from the local dangers.
There's also a chance that it could be a former enemy of Ben who has a grudge. They might want to get revenge on Ben by kidnapping him and putting him in a difficult situation. It could also be a mad scientist who wants to study Ben's alien forms and the Omnitrix, so they kidnap him to do all sorts of experiments on him.
Well, in a fanfiction, they could be on a mission to save a planet that is on the verge of destruction. Ben uses his alien powers to hold off the immediate threats, like asteroids or attacking creatures, while Kai tries to find the root cause of the planet's problems, which could be some sort of evil technology or a corrupt leader.
One possible plot could be that Rook and Ben go on an adventure to a new planet in the Ben 10 Omniverse. They encounter a strange alien species that has a unique power. Ben tries to use his Omnitrix to transform into an appropriate alien to deal with the situation, but there are some glitches. Rook, with his Plumber skills, helps Ben figure out what's wrong and together they overcome the challenges and make new friends among the aliens.