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 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.
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.
The theme of destiny also pops up. Is it Dean's destiny to have these archangel powers? And what is he supposed to do with them? Fanfics often explore these big questions in different ways.
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 common theme is redemption. Given Archangel's complex past and his sometimes - dark actions, many fanfics explore his journey to make up for his mistakes. Another theme is self - discovery. He has to figure out how to fully control his powers and what his role is within the X - Men.
One common theme is good vs. evil. The angel warriors and archangels often fight against dark forces. Another theme is redemption. Sometimes an angel or archangel has made a mistake and they strive to make up for it.
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.
One popular theme is Castiel's relationship with other characters, such as his loyalty to Dean and Sam. Another is his struggle with his angelic nature and his growing understanding of humanity.