One common theme is the origin story of the 5th Archangel. Writers often explore how this archangel came to be in the Supernatural universe. Another theme is its relationship with the other well - known archangels like Michael and Lucifer.
Power struggles are quite prevalent. The 5th Archangel might be depicted as having a unique power that either makes it a target or a powerful ally in the eternal battles within the Supernatural world. Also, redemption arcs can be a theme. Maybe the 5th Archangel has made some mistakes in the past and is trying to make up for it throughout the story.
One common theme is power and its consequences. Female archangels often have great power, and the fanfictions usually explore how they handle it, whether they use it for good or are tempted by the dark side of that power.
Another theme is the exploration of different realms. As Gabriel has the ability to travel between realms, fanfictions often take the soulmate on adventures through different planes of existence. This allows for some really creative and exciting storylines, with the couple facing various challenges in different supernatural settings.
Another theme is their relationships with humans. For example, an archangel might form an unlikely bond with a human character, and the fanfic delves into how that relationship develops and affects both parties. It can be a romantic relationship or a more platonic mentorship - like bond.
One common theme is the idea of power and its control. In Percy Jackson, the demigods have their own powers, in Supernatural the angels and hunters have powers, and Archangels are extremely powerful. Fanfics often explore how these different power sources interact. Another theme is the fight between good and evil. All three have clear concepts of good and bad forces, and fanfictions might bring them together in new battles. For example, the demigods and the Winchesters might join forces against a powerful demon or an ancient evil from Greek mythology.
One popular theme is the sister's relationship with her archangel brothers. It could be about her trying to fit into their world or dealing with their overprotectiveness. Another theme is her own powers and how she discovers and controls them in the context of the Supernatural universe.
A lot of fanfictions focus on the idea of Castiel being different from other angels because of his connection to the Winchesters. There are themes of forbidden love, like a romantic relationship between Castiel and an archangel which goes against the angelic rules. Also, the exploration of Castiel's true purpose and how it relates to the archangels' plans is a big theme.
Redemption is also a common theme. Given his complex backstory in the show, fanfictions often delve into Gabriel's journey towards redemption. This could involve him making amends for past actions or finding a way to atone for his mistakes. Writers might explore his relationships with other characters like Castiel or the Winchesters in the context of this redemption arc. It can be really interesting to see how different authors interpret his path to redemption.
One popular theme is the forbidden love aspect. Since archangels are often depicted as powerful and otherworldly beings, a relationship with a human soulmate can be seen as forbidden. Another theme is the idea of the soulmate bond being able to overcome great obstacles, like the battles and power struggles in the Supernatural universe.
In 'Hermione is an Archangel' fanfiction, a frequent theme is the clash between the celestial and the magical. Hermione being an archangel brings in elements of the celestial world into the wizarding world of Harry Potter. This can lead to themes like cultural differences between the two realms. Another common theme is the idea of chosen one. Hermione, as an archangel, might be seen as a chosen one to bring about some kind of change or balance between the two worlds, and this is often explored in these fanfictions.
Common themes include transformation. Percy goes from a regular character to an archangel, which is a huge transformation, both physically and mentally. Another theme is the exploration of the divine. What does it mean to be an archangel? How does Percy experience the divine realm? There's also the theme of love. It could be his love for his friends and family still on Earth, or a new kind of love that he discovers in the celestial world, perhaps with other angels or even with a new, otherworldly being.