Another pairing that might be popular is Jack (Magnus' sword) and Riptide (Percy's sword). It's a more unique and humorous pairing as fans might write about the two sentient weapons having conversations or competing with each other in some way.
Time - travel is another trope that shows up. Writers might send Percy or Magnus back in time to change something in the other's world. It creates a lot of opportunities for adventure and exploring different time periods in the Riordanverse. This can also lead to some really cool crossovers between the mythology of the two series.
Another common theme is character relationships. This could be romantic relationships, like a pairing between a Magnus Chase character and a Percy Jackson character. Or it could be friendships, exploring how characters from the two different series would be friends.
Percy would be very interesting. His charm and his ability to get into and out of trouble are always fun to read about.
A popular pairing could be Percy Jackson and Ziva David. Their different backgrounds and skills could make for an interesting dynamic. Percy with his demigod powers and Ziva with her combat and spy skills could team up in fanfiction to take on various threats.
If Percy reads positive fanfiction about Magnus, he might develop a new - found respect for him. He could start to think of Magnus as more of an equal in the world of demigods, even though they are from different mythologies. For instance, if the fanfiction shows Magnus doing heroic deeds, Percy would recognize the similarities between their roles as heroes. However, if the fanfiction portrays Magnus in a negative way, Percy might be a bit more cautious around him, wondering if there's some truth to those made - up aspects.
The Titans from Greek mythology could also be a good choice. Imagine if the Titans, who are still bitter about their defeat by the Olympians, team up with some of the more malevolent Norse giants. They could try to take over both the Greek and Norse realms, forcing Percy and Magnus to join forces to stop them.
I really like the idea of Percy and Magnus just chatting about their lives. Percy talking about his experiences with the Greek gods and Magnus sharing his Norse - related adventures. It would be a simple but really engaging interaction.
One interesting plot twist could be that they find out they are related in some way through the complex web of mythology. Maybe there's a long - lost ancestor who was part of both Greek and Norse worlds. Another could be that they are forced to swap powers. Percy has to deal with Magnus's Norse magic and Magnus has to handle Percy's water powers. It would be really cool to see how they adapt.
Definitely Annabeth from the Percy Jackson series. She can bring her strategic mind and knowledge of Greek mythology to the mix. And for the Magnus Chase side, Samirah. She has her own set of skills and beliefs from the Norse side that can add a lot of depth.
In this type of fanfiction, Harry Potter and Percy Jackson are quite popular as a pairing. Their different magical backgrounds but shared hero - like qualities make them a great match for many fans. Hermione Granger and Annabeth Chase are also well - liked. They are both book - smart and brave, and fans love to explore how they would handle challenges together. Additionally, some fans are interested in a pairing like Sirius Black and Percy Jackson. The older, more experienced wizard and the young demigod could have a really unique relationship in fan - created stories, with Sirius perhaps mentoring Percy in some ways.