The theme of friendship and unity is quite prevalent. Fairy heroes usually team up with others, and their bonds are crucial in their quests. Also, the idea of protecting nature is common. Since they are from the fairy realm, which is often associated with nature, they strive to keep it safe.
Power is often a big theme. How these heroes of the dark gain, maintain, and use their power. Also, loyalty. Since they are not the typical 'good' heroes, loyalty among them might be different. They might be loyal to their cause or to each other in a more complex way. And there could be themes of survival in a world that is against them.
One common theme is power exploration. Since both Peter and Claire have unique powers in the Heroes universe, fanfictions often explore how they can use, control, or combine their powers. Another theme is family. Given their complex family relationships in the original show, fanfictions may expand on how their family ties affect their actions and decisions.
Identity is also a common theme. Both characters have complex identities. Peter has the ability to absorb powers which can make his identity a bit fluid as he takes on different abilities. Sylar's identity is often tied to his search for more powers and his struggle with his own nature. Fanfictions might explore how their identities are shaped by their powers and their relationship with each other. Additionally, the theme of sacrifice could be present. Maybe Peter has to sacrifice something to stop Sylar, or Sylar might have to sacrifice his old ways to become a better person.
One common theme is brotherhood. Their relationship as brothers is often explored deeply, whether it's about loyalty, forgiveness, or protecting each other. For example, in many stories, they will put their lives on the line for one another.
One common theme is Percy's new powers as a god. Writers often explore how he deals with the added responsibilities and abilities. Another theme is his relationships, like his friendship with old comrades in a new context or his potential romantic relationships as a god.
One common theme could be the search for identity. Since the fairy is lost, it might be on a journey to figure out who it really is. Another theme might be about friendship, as the lost fairy may encounter other characters who help it along the way.
One common theme is the exploration of Hermione's new identity as a fairy. This often includes how she adjusts to having different powers and abilities compared to her normal witch self.
One common theme is the combination of magic and adventure. Just like in the original 'The Hobbit', there are quests and challenges, but the addition of fairies brings in a new level of magic. For instance, the fairies might use their magic to aid the characters in their travels or battles.
Another theme is friendship. Stiles forms bonds with the fairies, and they learn to rely on each other, like in 'Fairy Allies' where Stiles and a group of fairies team up to save their land from destruction.
Another theme is the power struggle. Sometimes the earl has power in his own world, and the fairy has magic power. How they interact with each other's power and whether they cooperate or compete is often explored. For example, in some fanfictions, they might have to combine their powers to defeat a common enemy. Also, the theme of self - discovery is prevalent. Both the earl and the fairy might learn something new about themselves through their interactions with each other, like in the fanfiction 'The Earl's New Path with the Fairy', where the earl discovers a more empathetic side of himself thanks to his adventures with the fairy.