Perhaps there's a plot where an old enemy from Varian's past returns. This enemy is after Varian's knowledge of alchemy. Rapunzel steps in to protect Varian. They go on the run and during this time, they share stories of their pasts. Varian tells Rapunzel about his father and how his love for alchemy started. Rapunzel tells Varian about her time in the tower. This makes their bond stronger as they face the threat together.
One idea could be that Varian creates a special invention for Rapunzel. Maybe it's a device that can help her better manage the kingdom's resources. For example, it could analyze the soil in Corona to determine the best crops to plant each season. Another plot could involve them going on an adventure together outside of Corona. They might discover a new magical place that holds the key to solving a problem in their kingdom. Or perhaps Varian gets into some trouble with his experiments, and Rapunzel has to use her leadership skills and kindness to help him out and also convince the people of Corona not to be too hard on him.
The relationship can be developed through shared adventures. For example, when they explore a new part of the kingdom together. During these adventures, they can rely on each other's skills. Rapunzel's ability to communicate with people and Varian's scientific knowledge can be combined to solve problems. This would make them respect and trust each other more.
One plot idea could be that Eugene has to go on a dangerous quest alone to find a magical herb to cure Rapunzel when she falls ill with a strange disease that normal medicine can't heal. Another could be a story where Rapunzel and Eugene accidentally swap bodies due to a magical mishap and they have to figure out how to reverse it while also dealing with the daily tasks in each other's bodies.
For a fanfiction plot, consider Rapunzel trying to teach other people in the kingdom how to use their own 'inner magic'. She could start a school or something similar. Along the way, she has to overcome the doubts of the more traditional members of the court. Another idea is that she gets transported to a different land where no one has ever seen magic like hers before. There, she has to prove herself and her good intentions while also finding a way back home.
One idea could be that the OC is a traveling artist who stumbles upon Rapunzel's tower. Rapunzel is intrigued by the OC's art and they start to create art together, using the long hair as an unconventional paintbrush. This could lead to a friendship where they both learn about the outside world through each other's eyes.
In Tangled Dark Varian fanfiction, an interesting aspect might be the relationships he forms. For example, his interactions with other characters could be more complex and conflict - ridden. He could befriend some unlikely allies or have more intense rivalries that add depth to the story.
One interesting aspect could be the exploration of Varian's character in new and unique situations. For example, in some fanfictions, he might form unexpected alliances within the Tangled Moon setting. This can lead to exciting adventures and character growth.
One good Tangled Varian x OC fanfiction could be 'A New Adventure'. It might explore how an OC enters Varian's world and they embark on a journey to discover new alchemy secrets together. Another could be 'The Unlikely Bond' which focuses on how Varian and the OC overcome their differences and form a strong friendship that might turn into something more.
One common theme is adventure. They might go on quests together, using Varian's scientific knowledge and Rapunzel's bravery. Another theme is friendship turning into love. Since they start as friends in the original story, fanfics often explore how their relationship deepens.
For a Tangled Rapunzel fanfic without the pregnancy aspect, you could write about Rapunzel exploring the world of science in her kingdom. She could be interested in botany and start a garden with all kinds of magical and non - magical plants. This could lead to her discovering new medicinal plants or ones that have other useful properties. Another concept is Rapunzel hosting a big festival in the kingdom to celebrate the unity of all the different people. She could plan all the events and decorations herself, using her artistic skills. Or, a story about Rapunzel learning how to be a diplomat, traveling to other kingdoms to make alliances and learning about different cultures along the way.