How about a time - traveling demigod? This character could accidentally end up in Percy's world and get involved with the Blades of Chaos. Their knowledge of different time periods could be used to either help or hinder Percy's journey with the blades, adding an element of mystery and unpredictability.
The Blades of Chaos can make Percy more confident. Since they are such powerful weapons, having them gives Percy an edge in battles. He becomes more self - assured as he knows he has these amazing blades at his disposal. For example, when facing tough opponents, he stands taller and is more fearless.
A character like a demigod with the power to control time could be really interesting. This character could be from a minor god's lineage. They could use their power to help Percy in battle, for example, by freezing time for the enemies while Percy attacks.
A half - human, half - nymph character could be interesting. This character could have unique powers related to nature that would complement Percy's water - based powers. They could also bring a fresh perspective on the relationship between humans and nature spirits in the world of Greek mythology.
A great main villain could be a rogue demigod who has found a way to corrupt the power of the hidden blades. This demigod could be jealous of Percy's fame and power and uses the blades to create chaos among the demigod community. He might be using the blades to steal the powers of other demigods, making him stronger with each theft.
One idea could be Percy losing the Blades of Chaos and having to go on a quest to retrieve them from a powerful new enemy. Maybe a dark sorcerer has stolen them to use in a ritual that would bring chaos to the mortal and demigod worlds.
In 'angel of chaos percy jackson fanfiction', the main character could potentially be a new demigod that has some sort of connection to the angel of chaos. Maybe this demigod is the only one who can understand or communicate with the angel, and they have to navigate through the Percy Jackson world while dealing with the chaos that the angel brings. Or perhaps it's a well - known character from the series who gets a new role because of the arrival of the angel of chaos, like Nico di Angelo having to deal with the dark powers of the angel in a way that no one else can.
There could be a chaos spirit named Eris. Eris could be a mischievous character who both helps and hinders Percy on his journey with chaos. She might have the ability to shape - shift into different forms related to chaos, like a swirling vortex of dark energy.
The Titans could be potential enemies. Even though they've been defeated before, some of them might be resentful and see Percy as the Chaos Champion as a new threat to their possible plans of a comeback. Kronos, for example, might have some of his essence lingering and try to possess other powerful beings to go against Percy.
A powerful chaos deity could be the main antagonist. This deity might see Percy as a threat to their plans of spreading chaos throughout the world. They could constantly send their minions to attack Percy and try to corrupt his mind.
Another possible antagonist could be a rogue demigod who is corrupted by the power of Chaos. This demigod might envy Percy's connection to Chaos and decide to turn against him. He could form his own group of followers, causing chaos (literally) in the demigod world. They would oppose Percy and his friends at every turn, believing that they are the rightful heirs to the power of Chaos.