The theme of family legacy is also quite popular. Hiccup is Stoick's son and Valka is his mother. Fanfics could explore how they carry on Stoick's values while also forging their own path for Berk and the relationship between humans and dragons.
Rather than seeking 'lemon' fanfics which are inappropriate, you could look for fanfics that explore the emotional bond between Hiccup and Valka. For example, there might be ones where they go on adventures together and strengthen their family ties. These can be found by simply typing 'Hiccup and Valka positive relationship fanfics' into your search engine.
It requires a deep understanding of the characters' personalities and the world they inhabit. You need to come up with creative and engaging scenarios that are in line with their traits.
Mainly, it's Hiccup and Valka. Hiccup is the protagonist we know from the 'How to Train Your Dragon' series, always curious and eager to learn more about dragons. Valka, on the other hand, is a mysterious figure who has her own set of skills and knowledge regarding dragons. When they meet in the fanfiction, their different personalities and experiences collide, creating an interesting dynamic that drives the story forward.
Well, perhaps in the fanfiction, Hiccup is in trouble while on a dragon - riding adventure. Valka, who has been observing from afar, comes to his rescue. This leads to them spending time together, with Valka teaching Hiccup some new dragon - taming techniques she has learned during her time in isolation. They could also have heart - to - heart conversations about Hiccup's father and how Valka has missed so much of Hiccup's life.
Perhaps in this fanfiction, Hiccup is out exploring on Toothless when they encounter a strange dragon behavior. Valka, who has been observing from afar, comes to their aid. She and Hiccup then work together to figure out what's wrong with the dragons. Along the way, they share stories about their individual experiences with different dragon species, and Hiccup is amazed by Valka's tales.
Maybe a rival Viking tribe that has a different view on dragons. They see dragons as a threat rather than friends like Hiccup and Valka do. So they try to disrupt the peace that Hiccup and Valka are trying to build between the Vikings and the dragons. They could be constantly causing trouble, stealing dragon eggs or attacking dragons, which would force Hiccup and Valka to take action against them.
It varies in different fanfictions. Sometimes, it could be through a chance encounter in a new adventure. Other times, it might be planned by fate or a magical intervention.
The very idea of a 'hiccup x toothless lemon fanfic' is a misappropriation of the original characters and their relationship. The original story is about friendship and adventure, and adding 'lemon' elements would distort this. It's better to focus on fanfics that stay true to the spirit of the original, such as those that explore new adventures for Hiccup and Toothless or expand on their bond in a positive and appropriate way.
You can start by imagining unique adventures or interactions for them. Maybe have them face a new challenge together or deepen their bond in a special way.