I really like the fanfic 'Villainous Intent'. It focuses on a group of villains in the Percy Jackson universe coming together to form a new, more powerful threat. The author does a great job of showing their motives and how they interact with each other, which makes it a very engaging read. It's full of action and plot twists that keep you on the edge of your seat.
One great 'Percy Jackson' fanfic is 'The Lightning Thief's Daughter'. It has an interesting plot where Percy has a daughter who discovers her powers. The author does a wonderful job of capturing the essence of the original series while adding new elements.
Luke Castellan can be considered an excellent villain in fanfiction too. His journey from a disillusioned demigod to a servant of Kronos is full of angst and betrayal. He has a deep understanding of the demigod world, which he uses against his former friends. His complex character, with his own reasons for turning bad, adds a lot of depth to the stories where he is the main villain.
There's also 'Bromance on the Argo II'. This fanfic is set on the Argo II and shows the different bromances among the characters. Percy's interactions with Leo and Frank are really interesting. It shows how they joke around, have each other's backs during battles, and how their friendships evolve into something deeper, which is really a great read for fans of bromance in the Percy Jackson universe.
One great 'Naruto Percy Jackson' fanfic is 'The Ninja Demigod'. It combines the unique powers from both universes in an exciting way. The main character, who has traits of both Naruto and a demigod from Percy Jackson's world, goes on thrilling adventures, facing challenges that require both ninja skills and demigod powers.
One great 'Poseidon Percy Jackson Fanfic' is 'The Son of the Sea God's Journey'. It really delves into Percy's relationship with his father Poseidon in a new and exciting way. The author does a wonderful job of showing Percy's growth as a demigod while also exploring the power dynamics between him and Poseidon.
One great 'Percy Jackson Silena' fanfic is 'Silena's Redemption'. It delves into Silena's character deeper, showing her struggles and growth in the world of Percy Jackson. It gives a new perspective on her relationship with the other characters.
One great 'Percy Jackson and Poseidon' fanfic is 'The Son of the Sea God's Journey'. It delves deeper into Percy's relationship with his father, Poseidon. The story takes Percy on a new adventure where he discovers hidden powers related to his godly heritage. It also has some great character development for both Percy and Poseidon, showing a more complex side of their bond.
Well, I really like the fanfic 'Annabeth's Time Away'. In this one, Annabeth goes on a solo adventure and discovers a new part of herself. It's cool because it shows her strength without Percy always being there. 'Percy and Annabeth: College Years' is also a fun read. It imagines their lives as they enter college, dealing with normal student problems along with their demigod issues. Then there's 'The Annabeth Initiative' which has an exciting plot full of mystery and action centered around Annabeth.
One great 'Percy Jackson Crossover Fanfic' is 'Percy Jackson and the Avengers'. It combines the world of Percy Jackson with the Marvel universe in a really interesting way. The characters interact in a believable manner and there are some really cool fight scenes.
One great Percy Jackson Rachel fanfic is 'The Oracle's Choice'. It explores a unique relationship between Percy and Rachel as she becomes more involved in the demigod world. Another good one is 'Rachel's New Path' which delves into how Rachel adjusts to her role as the Oracle and her connection with Percy. And 'Percy and Rachel: An Unexpected Bond' is also worth reading as it shows their friendship evolving in unexpected ways.