Well, he could be a messenger in the fanfiction. Just as he is often depicted as a messenger in religious texts, he could bring important news from the celestial realm to the demigod world. Maybe he warns Percy about a new threat that is coming from a place that the demigods have no knowledge of. And his presence could stir up a lot of questions among the characters about different mythologies and how they all connect.
Another plot could be that there is a rift between the worlds of angels and demigods that is causing chaos. Archangel Gabriel is tasked with closing the rift, but he needs Percy's help as Percy has a unique connection to the elements. Along the way, they face challenges from both sides who don't want the rift to be closed, and they have to fight against all odds to restore order.
In fanfiction, Percy might discover a hidden connection between his powers and the archangel's. Maybe there's a prophecy that links them, and they have to figure out how to fulfill it together. The archangel could teach Percy some new skills or perspectives that are different from what he's learned in the demigod world.
In some Percy Jackson fanfiction, archangels are often portrayed as extremely powerful beings. They might be depicted as having abilities far beyond those of the regular demigods. For example, they could have the power to manipulate celestial energy in ways that are unique to them. Their appearance is usually described in a very majestic way, with glowing auras and large, magnificent wings.
One common theme is the clash of different mythologies. Since Percy Jackson is based on Greek mythology and archangels come from religious or angelic lore, seeing how these two different systems interact is often explored.
Well, perhaps the archangel and Percy would have a power struggle at first. Percy is used to being in charge in his own adventures, and the archangel has its own set of divine powers and authority. They'd need to learn to work together, like when they encounter a group of mythical creatures that are causing havoc in both their domains.
In some Percy Jackson fanfiction, Archangel Michael is often portrayed as a powerful and otherworldly being. He might be shown as having a strong sense of justice, much like the angels are typically depicted in religious and mythological texts. His powers could be exaggerated compared to his normal depictions, perhaps being able to control celestial forces to an even greater extent in the context of the Percy Jackson universe which is filled with magic and mythical creatures.
Another idea is that there is some sort of prophecy that links Percy and the Archangel Michael. This prophecy could force them to interact, and they initially might be at odds with each other due to their different natures. Percy is a half - blood, used to the chaos and grey areas of the demigod world, while Michael is a pure celestial being. But as the story unfolds, they learn to work together.
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.
Yes, there are some. You can start by looking on fanfiction platforms like Archive of Our Own. There, you might find various interpretations of Bella Swan being Archangel Gabriel. Some stories might focus on how she adapts to the new celestial identity, while others could explore her relationships with other characters from the Twilight universe or the angelic realm in this new context.