In this fanfiction, a possible plot is that girl Percy has to prove herself in a world that often underestimates female heroes. She could be on a quest where she has to face monsters that are specifically difficult for female demigods to defeat. This would show her strength and determination. Additionally, her relationship with her mother could be explored in a different light. Since Percy is a girl, her mother might be more overprotective or have different hopes and dreams for her, which could create internal conflict for Percy as she tries to find her own path as a hero.
A great plot could be that girl Percy discovers new powers or abilities that are different from the original male Percy. This could lead to her being a bit of an outcast even among other demigods at first. Also, her love interests would be really interesting to explore. Instead of the typical relationships, she might develop a connection with a character that was just a friend in the original story. For instance, she could have a more complex relationship with Nico, which could add a whole new layer of drama to the fanfiction.
One idea could be that Percy, as a girl, has to deal with different expectations in the demigod world. For example, some might assume she's not as strong physically, but she proves them wrong by outperforming many male demigods in combat training. Another plot could involve her having a different kind of relationship with Annabeth. Instead of the typical male - female friendship - romance dynamic, they could have a more sisterly bond that still has elements of competitiveness and deep mutual respect.
One plot idea could be Percy having to team up with Hera to rescue a group of demigods who have been captured by an ancient monster. Hera, despite her usual aloofness, realizes she needs Percy's unique skills.
One plot idea could be Percy using his shapeshifting ability to infiltrate the lair of a powerful enemy. He could transform into a small animal like a mouse to get past defenses and then change into a more formidable form to fight. Another could be Percy struggling to control his shapeshifting, accidentally changing forms at inconvenient times, like during a school exam or a tense conversation with his friends.
One idea could be being reborn as a new camper at Camp Half - Blood. You could discover new powers related to water, like being able to create ice sculptures with just a thought, which is a unique take on Percy's water - based powers. Another plot could involve being reborn as a child of a minor god, like Hecate. You'd then have to struggle to prove your worth among the children of the major gods. And perhaps a plot where you're reborn with memories of the future, and you have to use that knowledge to prevent a great disaster at Camp Half - Blood.
One idea could be Percy and his friends getting trapped in a virtual game world that's a twisted version of their own. They have to use their demigod skills to defeat the digital monsters and find a way out.
Maybe Percy is sent on a quest to Atlantis because there are rumors of a traitor among the Atlanteans who plans to side with the Titans. Percy has to navigate the complex political situation in Atlantis and figure out who the traitor is before it's too late. He also has to deal with the Atlantean magic which is different from what he's used to.
One idea could be that Percy discovers a hidden realm within the world of the Wanderer. This realm has its own set of rules and challenges that he has to navigate. Maybe he meets new demigods there who have been lost for centuries.
One idea could be Percy having to make a deal with a minor underworld god to save Annabeth from a new and strange curse that's slowly draining her life force. He has to complete a series of tasks in the underworld that test his loyalty and courage more than ever before.
Well, perhaps the shield was once owned by a powerful demigod from the past. In the fanfiction, Percy starts having strange dreams about this demigod and the shield's true origin. As he investigates, he realizes that the shield holds the key to defeating a new, emerging evil that threatens not just Camp Half - Blood, but the entire world of gods and mortals. So, he has to figure out how to unlock the shield's full potential.
Here's an idea. Emma could be a mortal who accidentally stumbles upon the world of demigods. Percy is tasked with protecting her while also trying to keep the secret of the demigod world from getting out. As time passes, Emma shows an uncanny ability to understand the demigod world, almost as if she has some latent demigod blood in her. They develop a bond as they face various monsters and challenges sent by the gods who are not happy with a mortal being so involved. Their relationship could be a mix of friendship and something more as they go through these experiences together.