Universal Hunter

Percy Jackson... a legendary name, no more.
No longer welcome where he belongs, Percy has to move on to bigger and better things.
When his new life brings him outside of Earth, his life changes, and as he moves on from his past and looks to the future, everything changes.
Soon, he will be known throughout the universe and beyond, a being of power no longer concerned with Olympians or other. He isn't the same as he used to be; no, he is better.
Everyone will know justice, and they will learn thanks to his blade.
Now, welcome Arios, a half-immortal assasin who makes everything in life better.
Unless you're the one he's hunting of course.