What if Sally Jackson had a half-brother? What if he was a wizard? And what happens when Percy decides that he needs to help his uncle out? Percy travels across the seas, and into the shadows in a personal quest to help his uncle survive his role as double agent. And all the while, Percy must do his best to hide his true identity from the leader of the side his Uncle is spying on, Lord Voldemort.

She first saw him when she was 22 years old, and injured on a mission. He was 10 years old, and visiting an aquarium. Percy Jackson looked into Natasha Romanoff's weary but determined eyes, and decided to help her. And so, he pulled a lever, spilling his class and her enemies into a tank. That was not the last she saw of him. By the time several years pass, the two green-eyed siblings by bond will be known as heroes, albeit of different worlds. Perhaps they don't know everything about each other. But they do know that they will always have each other's backs. He helps her out when her missions don't go the way they planned, which doesn't happen too often. She teaches him how to be a good spy, although that isn't the intention when they start the lessons. And they become very close, just as close as true siblings, in fact. So when Natasha finds herself in a complicated position during the Avengers' Civil War, Percy decides to interfere. And the Avengers are extremely surprised when they meet Natasha's younger brother. Plans are made and set in motion, alliances are completely misconstrued, friendships are tested and broken, and the two siblings find themselves on their own side against the world. However, there's something bigger in the works for the Avengers, and they'll need all the help they can get to face it. Including the two green-eyed siblings in everything but blood. This is largely Marvel canon compliant up until Captain America: Civil War, with Percy's interaction with Natasha being a background to the PJO books. Cover by @cajoling - she's awesome, honestly I'd check out her work as well lol

Percy jackson is just 9 years old when his mother is killed in a plane crash. Alone and scared, Percy has no place to go, until his mother's best friend's fiance, Tony stark, decides to adopt him. Because pepper Pots was heartbroken when she found out that her best friend was killed and her son is all alone. Tony decides to take the kid in, thinking it would be easy.But its easier said than done. percy is quite a handful and it isnt long before the Avengers find out about him. then al of a sudden, when he turns twelve, Poseidon sends Grover to get percy and make him go to camp. However, percy doesnt want to leave Tony and pepper. When he turns nineteen, he finds out that a new evil is rising and the gods need his help. After that it's just a series of bad events and he ends up leaving. When he returns, wil he be the same? Or did the old Percy Jackson die when he left?

When Percy Jackson and the seven of the prophecy are turned in to children by an unknown foe, a spell that is irreversible even for the gods, they have to walk the streets of New York as six year olds. Yet the seven year olds have their eighteen year old minds. Oh the fates are cruel. But when they are picked off the streets and sent to the Rainbowsmiles orphanage, how will they stay together. The avengers have started a new program, adopt eight children to teach to be a new elite squad, like a backup avengers, in case anything were to happen to the team. When they see the kids on offer, none look too promising, except for eight six year olds with extraordinary fighting skill. Will the seven and Nico find purpose as a new squad taught by the avengers?

After the giant war, Percy Jackson's sanity was completly broken.Jason is gone. Piper is gone. Leo is gone. Frank is gone. Hazel is gone. Annabeth is dead. They all left Percy but at what cost? At the cost of Gaia's defeat. When Nick Fury thinks that Earth is threatened by Percy Jackson, Fury sends the Avengers to retrieve him. What will Percy do? Join him or fight? Will Percy be able to cope with his flashbacks?