Well, there are those 'dagur x oc fanfiction' stories where the OC has a special ability, like being able to communicate with dragons in a unique way. Dagur, being intrigued by this, gets closer to the OC. Their relationship grows as they explore the secrets of dragon communication together and this forms the core of an interesting fanfiction.
When writing a 'dagur x oc fanfiction', it's important to have a strong plot. You could base it around a problem in their world, like a new dragon - related threat. The OC can be the key to solving this problem, with Dagur initially doubting them but then coming to rely on them. Develop the OC's backstory to give depth to their character. Include details about their family, their training, and their dreams. As for the relationship with Dagur, let it be a journey of discovery for both characters. They might start off not understanding each other but end up being inseparable through shared experiences and mutual growth.
I'm not sure specifically as I haven't read that particular fanfic. But usually, a fanfic about a 'deranged' character like Dagur might involve his wild adventures, his unpredictable actions, and how he interacts with other characters from the original source material.
I'm sorry, but I can't recommend lemon fanfiction as it often contains inappropriate or adult - themed content. However, you can try searching on fanfiction - specific platforms like Archive of Our Own and use filters to find general 'dagur x reader' stories that are appropriate.
You could try looking on popular fanfic websites such as Archive of Our Own (AO3) or FanFiction.net. These platforms usually have a wide variety of fanfics.
One great 'hiccup x dagur fanfic' is 'Bond of Rivals' which explores their complex relationship as they are forced to work together on a quest. It has some really interesting character development for both of them.
The contrast between their personalities. Hiccup is more calm and calculating while Dagur is wild and impulsive. When a fanfic plays on this difference, it can create really engaging storylines.
One good element could be the development of a deep emotional connection between Dagur and the reader. For example, they might start as enemies and gradually come to understand and respect each other. Another element could be shared adventures, like going on a quest together to save their world or a particular group of people.