Another common theme could be the relationship between the dragon king and other races. For instance, how he interacts with humans, elves or other magical creatures. It might be about alliances, conflicts or even romances. Also, themes of mystery and discovery can be present, like uncovering the secrets of the dragon king's origin or the hidden powers he possess.
Themes of heroism and villainy can also be found. The dragon king could be portrayed as a hero, fighting against great evil, or in some cases, he might be the villain that the other characters have to oppose. There could also be themes related to the balance of the world. Since the dragon king is such a powerful force, the story might explore how his actions impact the balance between different elements in the world, such as magic and nature.
One common theme might be the power of the dragon king. It could involve stories about the dragon king's strength, influence, or the search for its power.
One common theme is the bond between the human and the dragon. It's about how they develop trust and friendship. For example, in some novels, the dragon starts off as a wild and powerful creature, but through the human's kindness, they become close companions.
Growth is a very common theme. The dragon hatchling usually starts off small and vulnerable, and then grows into a powerful dragon, both physically and in terms of character.
A common theme is friendship. Hiccup often forms strong bonds with different dragons. Another theme is adventure. He is constantly exploring new places in the dragon world. And leadership, as he takes on the role of the Dragon King.
One major theme is friendship. In these fanfictions, even as Natsu is the dragon king, his friends in Fairy Tail still play a crucial role. They support him and he has to balance his new position with his loyalty to his friends. Also, the theme of growth is there. Natsu has to grow into his role as the dragon king, learning new skills and ways of thinking.
Power is a common theme. The magma dragon king is usually extremely powerful, and the stories often revolve around how he uses or misuses that power.
Another theme is identity. Natsu often has to come to terms with his new identity as a dragon king. He may struggle with how it changes his relationships and his place in the world. Some fanfictions show his journey of self - discovery in this regard.
Power acquisition is a common theme. When a dragon reincarnates as a human, they often start from a relatively weak human form and gradually regain their former power or develop new and unique powers. For example, in many such stories, the reincarnated character discovers they have hidden strength within them that is related to their dragon past.
Power struggle is a common theme. Dragons are often depicted as extremely powerful creatures, and mages also have their own formidable magic. When a dragon devours a mage, it can be seen as a transfer of power or a way to gain an edge. Another theme is the clash of different species. Dragons and mages are typically very different, and their interactions can lead to complex relationships, whether it's out of fear, respect, or a need for mutual survival.
The theme of transformation and growth is also prevalent. The process of turning into a dragon is not just a physical change but also a symbol of the character's growth. They may start as a weak human but through the transformation, they become stronger and more confident, learning to adapt to their new abilities and responsibilities in the process.