The gods can be really interesting to include. Zeus, with his power and his often - unpredictable nature. Athena, with her wisdom and strategic mind. Apollo, who can add a bit of charm and his own set of powers like prophecy and healing. These characters can create all sorts of conflicts and alliances in the fanfiction.
Percy himself is obviously a must - include. His powers and his connection to Poseidon make him a central figure. Annabeth is also very popular. Her intelligence and her relationship with Percy add a lot of depth to the story. Grover is another great character. His loyalty and his role as a satyr can bring in some interesting elements, like his ability to sense danger and his connection to nature.
Aside from Percy, Jason Grace is often included. He has his own set of powers and experiences from being a Roman demigod, which can create great conflicts and alliances in fanfiction. Piper McLean is also a great character to add. Her charm - speak ability can be used in really creative ways in a story. And of course, Leo Valdez with his mechanical skills and humorous personality can add a lot of fun and action to the fanfiction.
Percy Jackson himself is very popular. He's the main character of the series, so fans often like to continue his story, explore his relationships further, or put him in new and challenging situations. His powers and his journey are really interesting to build on.
One popular original character is often a new demigod with a unique power. For instance, a demigod who can control time on a small scale, which comes in handy during battles and tricky situations. They add a fresh element to the existing world of Percy Jackson.
Percy Jackson himself is often very popular. Fans love to write more about his adventures, his relationships with other characters, and his growth as a demigod. He's the main character of the original series, so it's natural that he remains a central figure in fanfictions.
Percy Jackson himself is often very popular. People love to write about his further adventures at camp, or how he deals with new threats. Annabeth is also a favorite. Fanfiction writers might explore her relationship with Percy more deeply or show her using her wisdom in new and interesting ways. Another popular character is Nico di Angelo. His dark and brooding nature makes for great storytelling, especially when he interacts with the other campers at Camp Half - Blood.
Grover can be a great addition. His ability to sense danger and his connection to nature can be translated into some unique in - game abilities. Also, Nico di Angelo is quite popular. His control over the dead could be a very cool power - up or special ability in the fanfiction's gaming world.
Percy himself is obviously a very popular character to include since the whole concept of tg (transformation) can be applied to him in many different and interesting ways. His friends like Annabeth are also popular. You can create scenarios where Annabeth has to deal with Percy's transformation and how it affects their relationship.
A new demigod who has a very different set of powers from Percy. This demigod could be from a previously unheard - of parentage among the gods. For example, a child of Hypnos, the god of sleep, who can put people into different levels of sleep - like a deep coma - like sleep or a trance - like state. This would add a new dynamic as Percy has to figure out how to work with someone with such a different power set.
One idea could be Percy going on a quest to find a lost artifact that has the power to control the weather in the Olympian realm. This would put him in conflict with some of the gods who want to use it for their own purposes.
Jason Grace is often included. His leadership skills and ability to fly would be useful in various crossovers. In a crossover with the X - Men, he could be seen as a mutant with his flying and lightning powers. Piper McLean is also a favorite. Her charm - speak ability could be very effective in different crossovers. For instance, in a crossover with the world of Game of Thrones, she could use it to manipulate some of the power - hungry lords. And let's not forget Grover. His satyr nature and his loyalty to Percy make him a great addition to any crossover.