Annabeth could be really interesting. She could use her wisdom to strategize against the water dragon. For example, she might figure out the dragon's weakness by studying ancient texts about water - based creatures. Her knowledge of architecture could also come in handy if they need to build a trap or find a way to access the dragon's lair.
Annabeth is always an interesting character. In fanfiction related to Percy's pain, she can be a source of support or sometimes a cause of additional stress for Percy. For example, if Percy is in pain because he fears losing her, it shows the depth of their relationship. Grover is also great. His loyalty to Percy can be explored in new ways. He might be trying to help Percy through his pain, using his nature - related powers or just his friendship.
Annabeth Chase is often really interesting in fanfiction. She's smart and strategic, and in fanfiction she can be put in new situations where her wits are really tested. Grover Underwood too. His role as a satyr and his connection to nature can be expanded upon in fanfiction. Also, Reyna Ramirez - Arellano. She has a strong personality and her backstory can be further explored, especially in relation to Percy and Nico.
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.
Annabeth could be quite popular. In some fanfictions, she might be jealous of Percy's connection with Aphrodite and this could add a lot of drama to the story. Her intelligence and strong will would make her a force to be reckoned with in the love triangle situation.
I think a character with the ability to control time would be really interesting. Imagine Percy having to deal with a demigod who can accidentally mess up the time continuum. It would create all sorts of wacky situations at Camp Half - Blood. Like, one moment they're having breakfast, and the next, it's suddenly midnight because the adopted demigod made a time - related mistake.
A great plot could involve the water dragon being under the control of an evil sea god. Percy and his friends need to break the control spell on the dragon first. To do this, they have to find a magical conch shell that has the power to counter the spell. Along the way, they face many challenges from sea monsters sent by the evil god to stop them from reaching the dragon.
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.
There could be Annabeth. She is Percy's close friend and often plays a crucial role in Percy's adventures. In a situation where Thor kneels to Percy, she might be there to witness it and offer her own thoughts or reactions.
Perhaps a half - human, half - nymph character. This new character could have a special connection to nature, being able to communicate with plants and animals in ways that even Percy can't. In the context of a champion - themed fanfiction, they could be a wild card. They might not be fully trusted by the demigods at first because of their nymph heritage, but prove to be an invaluable ally in the end, using their unique abilities to help the champions in their quests.
His mom, Sally Jackson, could be a main character. She might be the one reading the books to baby Percy at first and then be there to answer his questions as he reads on his own later.