One interesting Percy son of Poseidon fanfiction could be about his adventures in a new, unknown part of the Underworld. Maybe he has to team up with some unexpected allies to face a new threat that Poseidon himself is unable to handle. This would be a great way to show Percy's growth and his ability to adapt to different situations.
There are fanfictions where Percy discovers a long - lost power of his father Poseidon. For example, he might find out that he can control not just water, but also some aspects of weather related to the sea, like tsunamis in a more precise way. This could lead to him having to deal with both the excitement of new power and the fear of misusing it.
Another plot could involve Percy discovering a hidden connection between Poseidon and Athena that was long forgotten. This could lead to a situation where he has to convince the other demigods that this connection is important for the future of the camp. Maybe there are ancient prophecies that only he can understand due to his unique parentage.
A great plot could be Percy getting caught in a power struggle between Athena and Poseidon's followers. Since he is the son of both, he is a symbol of unity or a threat, depending on how different groups view him. He could be forced to prove his loyalty to both sides while also trying to maintain peace among them. This could involve battles, political intrigue, and lots of character development as he tries to figure out where he truly belongs in this complex world of gods and their followers.
Maybe Percy discovers a prophecy that involves both his father Poseidon and Lupa. He has to journey to different realms under the sea and in the Roman wolf - related places. Along the way, he meets new demigods and creatures that either help or hinder him in fulfilling the prophecy.
One interesting plot idea could be Percy having to team up with a demigod child of Leto. They could go on a quest to find a long - lost artifact that has the power to restore balance between the sea and the moon's influence. Since Percy is the son of Poseidon, his control over water and the other demigod's connection to Leto's lunar powers would create a unique dynamic.
One interesting plot idea could be Percy having to deal with the conflicting natures of his 'parents'. Since Gaia represents the earth and Poseidon the sea, he might struggle with controlling both earth - related and sea - related powers. For example, when he's near a beach, he could accidentally cause small earthquakes or make strange things happen to the sea life. Another plot could involve Percy facing a threat that only his unique dual - heritage can defeat. Maybe an ancient evil that is both of the land and the sea, and Percy has to figure out how to combine his powers in a new way to stop it.
One idea could be Percy having to face a new and powerful sea monster that is awakened by an ancient curse. He'd have to use his powers in unique ways, maybe even discovering new abilities as the son of Poseidon. Another could be Percy traveling to a long - lost underwater civilization that has a connection to his heritage as an ancient son of Poseidon.
One plot idea could be Percy discovers a hidden prophecy that involves his connection to both Poseidon and Hestia. He has to go on a quest to find an ancient artifact that can only be retrieved with the combined powers of the sea and the hearth. Another could be that there's a threat to the world where only Percy, with his unique parentage, can restore the balance between the elements of water and home/fire. For example, a dark force is causing chaos in both the underwater realms and the peaceful places protected by Hestia, and Percy has to use his skills and the powers he inherits from his parents to stop it.
A great plot could be Percy getting into trouble in the mortal world and Poseidon having to come to his rescue without revealing his true identity to the mortals. This would create a lot of tension and interesting scenarios where Poseidon has to use his powers subtly. Also, they could be on a mission to save a group of sea creatures that are being hunted by an unknown and powerful force. Poseidon could be teaching Percy about the importance of all sea life along the way.
A cool plot could be Percy being sent on a quest that involves mending the rift between Zeus and Poseidon. Along the way, he meets old foes and new allies. He has to use his wits and the powers he got from his fathers to convince other gods and demigods to support his cause. For example, he might have to show the children of Zeus and Poseidon that they can work together instead of being rivals.
One plot idea could be Percy struggling to live up to Poseidon's expectations as a demigod son. Maybe he has to prove himself in a series of trials set by Poseidon to show he can handle the power and responsibility that comes with being his son. Another could be Poseidon trying to protect Percy from the wrath of other gods who are jealous of their relationship. He could use his power to shield Percy from various threats, leading to some tense showdowns.