Well, in this fanfic, it's possible that Ben and Gwen encounter some sort of time - traveling or interdimensional anomaly at the resort. This could be due to some ancient artifact or technology on the resort grounds. Ben would be eager to jump into action with his alien powers, while Gwen would be more cautious and try to figure out the cause first. They might also have some typical resort - like experiences in between, like enjoying the local cuisine and having some fun in the sun at the beach part of the resort.
In this fanfic, Ben and Gwen might have various adventures at the resort. They could discover a hidden part of the resort with some strange creatures. Ben might use his alien forms to deal with any problems that arise, like if there's a malfunctioning pool cleaner that turns into a mini - monster. Gwen could use her magic to help keep things in check and maybe they make new friends among the other guests or staff at the resort.
Perhaps in the 'Ben and Gwen at a Resort' fanfic, they participate in different resort activities. Ben could enter a water - based competition using his water - related alien forms. Gwen might be more interested in the cultural shows at the resort and drag Ben along. They could also get involved in a mystery where they need to find a missing item that belongs to an important guest. Their relationship as cousins would be tested and strengthened through all these experiences.
Well, they could go on adventures where their new - found feelings add an extra layer of tension. For instance, when they're in a dangerous situation, Ben might be more protective of Gwen because of his love for her.
Well, at the ski resort, they could meet some interesting characters. Maybe there's a local ski expert who teaches them some really cool skiing tricks. Ben, being his adventurous self, would be eager to try out the new tricks right away. Gwen, on the other hand, might be a bit more cautious at first but then get into it. They could also explore some hidden parts of the resort together, like an old cabin in the woods that has a lot of interesting stories and secrets.
They could meet other young skiers their age. They might become friends and have a great time skiing together.
The main characters are Ben and Gwen. Ben is a boy with the ability to transform into various alien forms using the Omnitrix. Gwen is his cousin who has magical powers. They are often together, getting into all sorts of adventures.
Perhaps the 'lemon' is a key to unlocking different time portals. Ben and Gwen might discover this lemon - shaped key in an old attic or a mysterious cave. Every time they use it on a specific time - travel device, it takes them to a new and exciting era. They could end up in ancient Egypt and have to solve the mystery of a lemon - related curse that is affecting the pharaoh's tomb.
One possibility is that the story could explore how Gwen's personality changes when she has the Omnitrix. She might become more confident or more responsible. Also, there could be new villains who are attracted to the Omnitrix now that Gwen has it. She would then have to face these threats and protect the Omnitrix from falling into the wrong hands.
One possible plot could be that Older Ben, having experienced more of the Omnitrix's power and the perils of the universe, takes Younger Gwen under his wing to train her in her magical abilities. They might go on adventures together where Ben uses his alien forms and Gwen uses her magic to fight enemies. Along the way, they develop a deeper bond of friendship and mutual respect.
In the 'Ben 10 is kidnapped' fanfic, his friends like Gwen and Grandpa Max would surely try to rescue him. They might use their own powers and knowledge to track down the kidnappers. Gwen could use her magic to find clues, and Grandpa Max has a lot of experience dealing with dangerous situations. So they would form a rescue team and start their mission.
A 'Ben loves Gwen' fanfic could explore a different side of their relationship. It might show a more romantic aspect compared to the normal sibling - like dynamic in the show. Maybe it could be set in an alternate universe where they're not related and the feelings develop naturally.
One interesting storyline could be Ben and Gwen having to face a new, powerful alien threat that they've never encountered before. They might have to combine their unique skills and powers to defeat it.