Jason is likely to be another main character. Since he has his own set of skills and knowledge, he might have an interesting relationship with Percy in this story. Maybe he's a bit jealous at first of Percy's control over the ship, but then they end up working together really well. And of course, Piper could be there too. She might use her charm - speak abilities to help the crew communicate with any strange creatures they encounter during Percy's time controlling the Argo 2.
It could be that Percy's control of the Argo 2 is a result of some new power he has gained. This new power might attract the attention of both friends and foes. His friends might be in awe and a bit worried about this new development, while his enemies might see it as a threat. So, there could be a lot of political intrigue and battles as different parties try to either support Percy or take his newfound power away from him. And all of this while he is trying to use the Argo 2 to reach their ultimate destination.
Percy in 'percy controls poison fanfiction' could be a character that the fanfiction author has designed with unique abilities related to controlling poison. Maybe it's someone inspired by a real - life figure, a historical character perhaps, but more likely it's a fictional creation within the realm of the fanfiction. It could also be that Percy is a character borrowed from a popular book, movie, or game series, and the fanfiction writer has given them this new role of controlling poison for the purposes of their story.
Percy could be an original character created by the fanfiction author for this specific story. Or he might be a character borrowed from another work, like Percy Jackson perhaps, and given this new 'controls all elements' ability in the fanfiction world.
They might face new and strange monsters. For example, they could encounter a sea - serpent that has the power to control the weather around the Argo 2. Percy would use his water - controlling abilities to try and fend it off while Annabeth comes up with a strategic plan to defeat it.
Well, 'percy controls blood fanfiction' might be about a Percy who has some kind of blood - controlling power. Maybe it's set in a world where there are different factions or groups, and Percy's power makes him a target or a key figure. It could explore themes like power struggles, morality, and identity as Percy grapples with his unique ability.
It could be an enemy that manages to sneak onto the Argo 2. Maybe a monster that they thought they had defeated before but actually just bided its time and then attacked Percy when he was least expecting it.
Well, he might be unable to perform his duties on the ship for a while. His friends would surely be worried sick and would probably do everything they could to nurse him back to health. Maybe Annabeth would take charge of his care, using her wisdom to find the best way to heal him.
He might start yelling. Percy is known for his passionate nature, so when angry on the Argo 2, he could raise his voice at those who he thinks are at fault.