Maybe some minor gods or spirits could be involved. For instance, a nymph who has some knowledge of the place where Artemis is being held captive. Also, some of Percy's old enemies-turned - allies could show up. They might have some unique skills or knowledge that can contribute to the rescue mission, like a former monster who now has a change of heart and decides to help Percy save Artemis.
There could be some of the other Olympian gods. For example, Apollo might appear. Since he is Artemis's brother, he would be concerned about her safety and could provide some help or information to Percy. Chiron, the centaur trainer at Camp Half - Blood, is also a likely character. He has a vast knowledge of mythology and could give Percy advice on how to deal with the situation and the enemies involved in Artemis's capture.
The Hunters of Artemis are very likely to show up. They are Artemis's loyal followers and would surely be involved in the search for their mistress. Annabeth could also be there. She's Percy's friend and has great wisdom, which could be useful in devising a plan to save Artemis. Grover might be another character. His ability to sense things could help in tracking Artemis or finding clues about her whereabouts.
The other characters could include Artemis's hunters. They might play a role in Naruto's training or become his comrades. Also, some of the Naruto series' main characters like Sasuke or Sakura could still be part of the story. They might be curious or even suspicious about Naruto's new upbringing.
The male gods would be the most likely opponents. Gods like Zeus, Poseidon, and Apollo might not be happy with Fem Percy and Artemis's ideas of a female - dominated world or their dislike for boys. They would see it as a threat to their power and the existing order of things.
Obviously, Percy Jackson and Artemis. Percy is the main character of the original series, and since he's the 'assassin' in this fanfiction, he's central. Artemis is the one he's wrongly accused of trying to assassinate, so she's also a key character.
Well, there could be new characters created specifically for this fanfiction. For instance, Chaos might have his own loyal servants or minions who interact with Percy. There could also be other heroes or demigods from different pantheons. They might come to Percy for help or to challenge him. And of course, Percy's mother, Sally. She might be worried about her son and try to reach out to him, even though he is now in the realm of Chaos. Her presence could add an emotional aspect to the story as Percy has to balance his new life with his love for his mother.
Annabeth is quite popular. Since she has a relationship with Percy in the original series, in fanfiction related to Percy and Artemis, she can be a source of conflict or support. For example, she might be jealous of the time Percy spends with Artemis. Another popular character is Thalia. Her connection to Artemis as a member of the Hunters makes her an important figure. She can add more depth to the stories, especially when it comes to the dynamics between the Hunters and Percy. And then there's Grover. His loyalty to Percy and his unique abilities as a satyr can bring a different flavor to the fanfiction. He might be the one who tries to mediate between Percy and those who are skeptical of his association with Artemis.
One possible plot could be that Artemis is captured by some powerful ancient enemy, like a primordial being. Percy, with his skills and courage, embarks on a quest to find her. He might face various challenges and monsters along the way. Maybe he has to solve some riddles related to the moon, as it's Artemis's domain. Finally, he locates Artemis and uses his water powers in a creative way to defeat the captor and free her.
In the fanfiction, Artemis might use her divine powers. Maybe she creates a distraction so that Percy can escape from Gabe. For example, she could make a sudden bright light or a loud noise that confuses Gabe, giving Percy the chance to run away.
Maybe Artemis sees Percy's potential. Percy has shown great courage and skill in other situations, and Artemis might recognize that he could be an important asset in the future battles against the forces of evil. So, she decides to save him from Gabe, who is a nuisance and a threat to Percy.
Well, she could betray Percy by revealing his secrets to his enemies. Maybe she's forced to do so under some kind of magical compulsion or threat.
The two main characters are Percy and Artemis. Percy, who is likely to have his own set of skills and powers in the fanfiction world, is beaten by Artemis. Artemis is a powerful figure, perhaps in this fanfiction she uses her archery skills, her leadership among her hunters, or her divine powers to overcome Percy. It's all about the interaction between these two characters that makes up the core of this fanfiction.