Who could be the betrayer in a Percy Jackson time - travel fanfiction with betrayal?

Luke might be the one to betray Percy again in a fanfiction. Even if he had a change of heart before, perhaps in this fanfiction he's been influenced by some dark force once more. He could pretend to be on Percy's side and then stab him in the back when Percy least expects it.

Another possibility is that it could be a character who has been corrupted by dark magic. This character was once a friend or at least an acquaintance of the dragon rider. But the dark magic makes them see the dragon rider as a target. They betray the rider in the hopes of getting some sort of power or reward from a more powerful evil entity.

It could be a jealous rival of Twilight. Maybe someone who has always been envious of her status and power in Canterlot.

It could be a jealous demigod. Maybe someone who is envious of Percy's popularity and Nico's unique powers. This person might see an opportunity to get rid of them and take their place in the demigod hierarchy.

It could be an enemy in disguise. Maybe a Grimm has managed to infiltrate their ranks in a clever way and then betrays the Rose character. Grimm are known for their devious ways and this would be a very RWBY - like scenario.

Definitely Annabeth. Since she has a strong connection with Percy already, in a time travel scenario, she could be one of the main characters in the harem. Also, Piper could be there. Her charm - speak ability might play an interesting role in the harem dynamics. And perhaps some of the minor female characters from the series like Silena Beauregard could also be included if Percy travels to a time when she was still alive.

A Kronos - like figure could be a likely villain. If someone were to time - travel and accidentally free a younger, more malevolent version of Kronos, he could cause all sorts of chaos. He has a grudge against the Olympians and would stop at nothing to regain his power.

Percy could change the past and accidentally create a new future. For example, if he stops Chronos from a certain event, it might have unforeseen consequences for the demigod world he knows. He might return to his own time to find that his friends are different or that Camp Half - Blood has changed drastically.

Well, perhaps in this fanfiction, Percy Jackson is sent on a time - travel mission by the gods. But he discovers that his friends or allies have betrayed him. Maybe they've made a deal with an enemy from another time period. For example, they could have promised to help Kronos in the past in exchange for power in their own time. Percy then has to not only deal with the time - travel chaos but also face the betrayal and find a way to set things right.

One idea could be Percy accidentally travels back in time and encounters Chronos in his prime. Maybe he has to team up with some of the old - time demigods to stop Chronos from an early attempt at world domination. It would be full of action and adventure as Percy tries to use his modern skills in an ancient world.