One common theme is the exploration of their different cultures. Iron Bull is a Qunari and Lavellan is an elf, so their cultural differences can create interesting conflicts and reconciliations in the stories.
You can try some popular fanfiction websites like Archive of Our Own (AO3). There are usually a large number of Dragon Age - related fanfics, including those about Iron Bull and Lavellan. Just use the search function on the site and type in 'Iron Bull x Lavellan' to filter out the relevant works.
Iron Bull in fanfiction usually has a complex personality. He is a warrior, but also has a softer side. He might show his vulnerability when it comes to his personal relationships. For instance, his relationships with his Chargers are often explored in depth, showing his care and concern for them. Also, his sense of humor is often highlighted, which makes him a more relatable character.
In a Dragon Inquisition and Iron Bull fanfiction, it could be interesting to see the Iron Bull in a romantic relationship. He might fall for a character from a different race or background within the Inquisition. This would bring out his softer side and also create some conflict as they have to deal with the prejudices and expectations within the Inquisition. The story could then revolve around how they overcome these obstacles while also dealing with the larger threats to the Inquisition like darkspawn or rogue mages.
The Iron Bull is a complex and interesting character in Dragon Age fanfiction. He is often depicted as a strong and loyal warrior. Fanfictions might explore his relationship with other characters like the Inquisitor, or his past in the Qunari military. His unique personality, which combines brute strength with a certain charm, makes him a favorite among many fanfiction writers.
One great fanfiction could be about Female Adaar and Iron Bull going on a dangerous quest together. They might face many challenges and in the process, develop a deep bond of friendship. Maybe they start off not trusting each other fully but as they fight side by side, they learn to rely on one another.
I really like the fanfic 'Iron Bull's Devotion to the Inquisitor'. It shows how Iron Bull's loyalty to the Inquisitor grows over time. There are some really sweet moments between them, like when they have private conversations under the stars after a long day of dealing with various threats to the Inquisition.
Iron Bull's relationship with other characters in fanfiction can vary greatly. He might have a deep friendship with Dorian, which is full of banter and mutual understanding. Or his loyalty to the Inquisitor could be explored on a more emotional level, delving into how he would sacrifice for them. Fanfiction gives us the chance to see different sides of his character that may not be fully explored in the game.
One popular trope is the 'Redemption of Iron Bull'. This often involves him breaking away from some of the more rigid aspects of the Qunari culture he was raised in and finding a new sense of self. Another is the 'Iron Bull and the Inquisitor Romance', where writers explore a romantic relationship between him and the player - character, delving into the complications that arise from their different backgrounds.
One common theme could be romance. Since it's a 'lemon' which often implies a more adult - themed relationship aspect. Another theme might be adventure, as the Iron Bull character is often associated with action - packed scenarios in the original context, and fanfictions may incorporate this while exploring his relationships.