A/N: This is an idea I had before. I normally detest OCs, but I still want to write her in. Let me hear your feedback on her, so I know to include her in the actual series.

A/N #2: Chronologically, this takes place after the first story.

Disclaimer: Just to be safe, Rick Riordan owns Percy Jackson (the universe where this is happening)

One month later

Sydney gritted her teeth. Harnessing the darkness was difficult. She could barely control the shadows to even bend into a simple figure such as a horse. She didn't understand how Chaos wanted her to actually be able to use it as a weapon. Sighing, she went to her quarters. Despite what some myths claimed, jumping into Chaos wasn't suicide. It was actually quite pleasant there. The only issue was that nobody decided to jump into Chaos's , Sydney was lonely. Percy was off training in Hyperion's powers, while Sydney could only control the shadows. She had wanted to learn how to manipulate light, since she was (ironically) scared of the dark.

Chaos watched Sydney with approval. It was relatively rare that a mortal could even scratch the surface of a primordial's power, but this girl was doing it. Her auburn hair had darkened into raven, a sign that she was moving to truly understand the might of the primordials. Even her irises were changing from a light blue into black. He watched as she bent the shadows into an indistinguishable blob. He was duly impressed by her progress, as the Nyx's last child had spent a whole year to get to where Sydney was right now. Chaos stepped out.

"Well done, Sydney. While you might think that your progress is slow and not getting anywhere, you are learning to harness a primodial's strength. The fact that you haven't died yet is truly a testament to your strength."

Sydney glanced at him, and sighed. "I'll never get it. It's too difficult!"

"Patience." With that, Chaos faded back into the shadows. Sydney sighed, but decided that practice was the only way.

A/N #3: Son of Chaos 1 is almost finished, but still not to my expectations. It will come out later, and more Sydney once Son of Chaos 2 is almost done. (I am working on the first chapter for Son of Chaos 2)