Jason Grace could be a great addition. His leadership skills and ability to control the winds could be used to combat Gaea's earth - based powers. He could also be a good friend to Percy, trying to pull him out of any dangerous situations involving Gaea. And then there's Grover. Grover's connection to nature could give him some unique insights into Gaea. He could be the one who senses when Gaea is up to something and warns Percy, adding a bit of comic relief to the otherwise serious situation with Gaea.
Well, Annabeth could be added. She would be really important as she is Percy's love interest. Her intelligence and strategic mind could play a big role in dealing with Gaea. Maybe she tries to find a way to break Gaea's hold on Percy if Gaea has some sort of power over him. Another character could be Nico di Angelo. His powers over the dead might be useful in uncovering secrets about Gaea's past and weaknesses. He could also be a voice of reason for Percy when Percy is in a difficult situation with Gaea.
Piper McLean could be a great addition. Since she has some connection to Aphrodite already. She could either help Aphrodite in her plans or try to protect Percy from her. And of course, we could add some minor gods or goddesses like Eros. He could be Aphrodite's little helper in creating chaos with love arrows, which would definitely fit in with the lemon aspect of the fanfiction if it involves some love - related mischief.
Annabeth could be a crucial supporting character. She might use her wisdom to come up with a battle plan. For example, she could figure out the best time and place for Percy to attack Gaea based on her knowledge of ancient prophecies and Gaea's patterns.
Grover Underwood could be included. His knowledge of nature and his ability to sense danger could be very useful. He could provide some comical relief in the midst of the serious prophecy - related events. And his loyalty to Percy would ensure that he is always there to support him, even when dealing with the often - prickly Artemis.
Obviously, Percy will be the main character. He is the one doing the destroying after all.
Obviously, Percy and Gaea would be the main characters. But there could also be other characters like Annabeth. She might be heartbroken at first when she hears about Percy's marriage to Gaea. And then there could be some of the other demigods like Jason or Piper who would be involved in trying to understand what's going on and maybe even stop it if they think it's a bad thing.
In this fanfiction, there could be a prophecy about a lemon that will either save or doom the world in the face of Gaea's threat. Percy Jackson is tasked with finding this lemon. Along the way, he meets various characters who either help or hinder his quest. When he finally finds the lemon, he has to make a difficult choice. If he gives the lemon to Gaea, she might spare some of his friends but would gain enough power to cause great destruction. If he destroys the lemon, he risks angering Gaea and starting a full - scale war. So, he has to find a third option that no one has thought of before.
Grover could be a part of it as Percy's best friend. He could give Percy advice about his relationship with Calypso and also get involved in some of the school's crazy events with them. Leo could also be added as the school's resident inventor who helps Percy and Calypso with any technical problems they face during school projects or events.
Another great addition could be Circe. She has a lot of knowledge about magic and the supernatural. In the fanfiction, she could be an ally or an enemy. If she's an ally, she could teach Percy and Artemis some spells to combat the chaos - influenced threats. If she's an enemy, she could be working with the forces of chaos to try and gain more power.
In a fanfic, Percy could have a mental battle with Gaea where the lemon plays a key role. Imagine Percy enters Gaea's mind - realm. There, he finds a withered lemon tree. By using his willpower and connection to the ocean (as water is also related to life like the lemon), he tries to revive the tree. As he does this, Gaea is forced to watch and is affected by his actions. If he succeeds in making the tree bloom again, it could signify his victory over Gaea's destructive plans.
Gaea herself would obviously be a main antagonist. She has the power to manipulate the earth and all its forces against Percy. Her children who are fully committed to her cause could also be major antagonists. They might have powers related to the earth and be very difficult for Percy to defeat.