Another popular character could be Annabeth Chase. Her intelligence and strategic thinking can add a different dimension to the stories. In the context of Crusader fanfiction, she could be the one to bridge the gap between the two different worlds. She might be able to communicate with the more learned Crusaders and come up with plans that involve both Greek demigod powers and the military strategies of the Crusaders. Grover is also liked in some fanfictions as he brings a bit of humor and his own set of nature - based powers to the mix.
Some of the more mysterious or powerful Crusader characters tend to be popular too. For instance, a fanfiction might focus on a Templar Knight with some hidden knowledge or a special relic. When combined with Percy Jackson's world, this character can create a lot of intrigue. And of course, any character that has a connection to the supernatural elements in both the Percy Jackson universe and the Crusader era, like a seer or a prophet, is likely to be popular in the fanfiction.
Percy Jackson himself is often a very popular character. His powers and his adventurous spirit make him a central figure in most fanfictions. The Crusader characters that are often popular are the ones with strong leadership qualities or unique combat skills. For example, Richard the Lionheart if he is included in the fanfiction. He has a heroic reputation that can be interesting to pair with Percy.
One interesting storyline could be a crossover where Percy Jackson meets the Crusaders in a modern-day setting. Maybe they have to team up to fight a common enemy that is threatening both the world of Greek mythology and the historical context of the Crusaders. Another could be Percy using his powers in a way that the Crusaders initially misunderstand, leading to some conflict before they realize they can work together.
Percy himself is of course a very popular character in this type of fanfiction. Since it's about his journey in the past, he's the central figure. Another popular character is Annabeth. Fans often write about her either accompanying Percy in his time - traveling adventures or being the one waiting for him back in the present while he's in the past. And then there are the gods. Zeus, Poseidon and Athena are often included as they play important roles in Percy's past - related stories.
Percy Jackson himself is often a central character in these fanfictions. His powers and his journey as a demigod make him a natural focus. Annabeth Chase is also popular as she brings her intelligence and strategic thinking to the stories. Grover could be another popular character, especially if the fanfiction involves exploring new areas in Canada, as his nature - related abilities can come in handy.
Grover often appears in fanfiction as well. His loyalty to Percy and his own unique abilities as a satyr can be used in really interesting ways. For example, a story could revolve around Grover's search for a new type of magical plant that could save Percy from a deadly curse.
Obviously, Percy Jackson is a very popular character in this type of fanfiction as the concept often revolves around her in a futa form. Annabeth Chase is also popular as she is Percy's main love interest in the original series, and in the fanfiction, their relationship can be explored in new and different ways.
Percy himself is obviously very popular. After all, it's his series. Annabeth is also a fan favorite, as her intelligence and strong will make for interesting storylines. Nico di Angelo is quite popular too, especially when his powers and his somewhat dark nature are explored in fanfiction.
Annabeth Chase is also a favorite. Her strategic mind makes her a key player in the capture the flag scenarios. She can come up with brilliant plans to outmaneuver the other teams, like setting up elaborate traps or diversionary tactics.
Percy Jackson himself is of course very popular. His friends like Annabeth Chase also often appear. Grover could be there too, still being Percy's loyal friend. New characters might include college professors who turn out to have some connection to the world of mythology, like a history professor who is secretly a descendant of a minor god.
Grover can also be quite prominent. His loyalty to Percy remains a key factor. In some fanfictions, his connection to nature might be enhanced to better support Percy in his overpowered adventures. For example, he could be able to communicate with more powerful nature spirits to assist Percy in battles or quests.
One popular original character is often a new demigod who is related to Percy's family in some way. For example, a cousin who has a unique power that helps Percy and his family in their battles. This character adds a fresh perspective to the family's adventures.