You could write a fanfic about the Infernal Dragon's relationship with other magical creatures. For instance, how it interacts with fire spirits that are native to the hellish dimension it comes from. The dragon could be seen as a sort of protector or a tyrant over these spirits, and the story could revolve around a young fire spirit that tries to change the dragon's ways.
The Infernal Dragon itself is often a main character. It could be portrayed as a powerful and menacing being, or as a misunderstood creature. Another common character is the dragon slayer, a brave warrior who has dedicated his life to defeating the dragon. There might also be a wizard or sorceress who has some connection to the dragon, either trying to control it or seeking its power.
I'm not sure which novel you're referring to. The Dragon Ball Saga: Infernal Affairs, the title does not explicitly refer to any TV series or movie. If you can provide more information such as the chapter or title of the novel, I will try my best to help you answer.
One highly recommended fanfic is 'A Tale of Two Cities' which explores an alternate storyline for the characters. It has great character development and an engaging plot.
You can try some popular fanfiction websites like Archive of Our Own (AO3). It has a large collection of fanfics including those for 'The Infernal Devices'.
Blazing Stars was a 3v3 cross-server competitive game with three classes. The game was based on the 1.76 version of the three-class Legend, adding a variety of gameplay such as pet help, magic wing upgrade, joint attack, and artifact creation, allowing players to relive the madness and passion of the legendary world. There were plenty of benefits and rewards in the game, including giving battle pets at the beginning of the game, logging in to receive red packets, full drop rate, and full attack speed. In addition, completing the main mission was the main way to obtain experience points and game items, and the first recharge was also an important way for novice players to quickly increase their combat strength. There was also a wing system in the game. When players wore spiritual feather equipment, they could increase the attributes of the character. Overall, Blazing Stars was a legendary mobile game full of passion and madness, suitable for players who liked PK and gold farming.
One common theme could be the exploration of their deep emotional connection. Elements like magical adventures and challenges they face together often feature.