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

Everything was going perfectly after the war was over. However, one day, when a son of Morpheus came to camp, Percy's perfect world started to crumble. He was once known as the leader of camp and Savior of Olympus. However, after much influence from this new demigod, he was known as the selfish jerk of the camp who abused his status and powers to torment the other campers just to give him a laugh. Driven out of camp, Percy searched for a new life while trying to come to terms of his friends' betrayal. He searched and searched until he read of the many worlds outside of Earth and knew then that was where he was going to search for his new life. Hey Guys! This is going to be my Chaos fan fiction. It's going to start out similar to other Chaos stories with the betrayal stuff but I want to focus more on Percy's life before he is sent back to Earth and basically how he becomes the most powerful bad ass in the history of the universe.