In some fanfics, Percy's powers could be used in a more stealthy way. For instance, he could use water to create mirages or illusions to deceive his enemies. This would require a great deal of control over his water - based abilities and show his growth as a character. It also allows for more complex and exciting plotlines in the fanfic world.
He might be really surprised. Fanfiction can present him in all kinds of new situations that he never thought of. He could be amused by some of the creative interpretations of his character and his adventures.
Well, he could have water - based mutant powers. Since Percy already has a strong connection to water in his original story, as a mutant, he might be able to control water on a molecular level. He could create water out of thin air or turn water into ice instantly for offensive or defensive purposes.
In Percy Jackson fanfics, his powers are often enhanced and explored in creative ways. His ability to control water can be shown in more extreme situations, like creating massive tidal waves to protect his friends or using water currents to travel at super - fast speeds across the ocean.
His powers could be more nature - based. For example, instead of just controlling water, he might be able to control all forms of liquid in nature, like sap or blood. His connection to the wild could also make him more attuned to the emotions of animals, allowing him to communicate with them more effectively.
If he gets a new and powerful ability, his friends might feel a bit intimidated at first. For example, if he can control time, they may worry that he could change things without their consent. But over time, they would learn to trust him with this power and it could actually strengthen their bond as they work together to use it for good.
Well, in a fanfiction where Percy is born in Greece, his powers would likely have a more 'Greek - flavoured' aspect. Since he's in the homeland of the Greek gods, his connection to water could be intertwined with the Greek concept of the four elements. So, his water powers might interact more with the other elements in a way that is more in line with Greek elemental theory. He might also be able to draw on the power of Greek water deities more directly, which could enhance his abilities and give him new ways to use his powers in battles and other situations.
Well, instead of summoning water or having a connection with the sea, he might have the power to shift shapes, a common ability associated with Loki. He could turn into different animals or even other people to gain an advantage in a fight or to infiltrate an enemy's stronghold. Also, his power over fire could be enhanced, as Loki has some association with fire in Norse mythology. He could use this to create distractions or attack opponents from a distance.
His powers would likely become more god - like. He might gain the ability to control lightning, like Zeus. Also, his strength and speed could be enhanced to a much greater degree. His control over water, which was his main power before, could also be amplified and perhaps combined with his new lightning powers in some unique ways.
It could be a rogue demigod who is jealous of Percy's powers and wants to stop him from mastering them. This demigod might have some dark powers of their own and would constantly set up traps and challenges for Percy. For example, they could use illusions to make Percy doubt his own powers and abilities.