Annabeth's POV

I snickered at the sight of my new sister. I had known she was a child of Athena from the start. I mean, just looking at her ypu could tell she had OCD or something. Percy put his hand on my shoulder, and I went to a normal smile.

"Hermione, right?" I asked. If I thought right, I knew exactly who these kids were. The girl looked startled.

"How did you know my name?" She asked.

I pulled a large book-so large Percy's eyes bulged-out of my pack. I handed the paper back reading The Half-Blood Prince to Hermione.

"It had the word Half-Blood in the title," I told her as she flipped through the pages. "So I got interested, and Di Immortales, what a good series it is!"

"So," Hermione said, handing the book back. "Everyone thinks is three are fiction?" I shrugged.

"I guess," I told her. "Anyways, follow me Hermi, I have the honor of showing you your cabin sister!"

"Sister? Cabin? What?" She asked, as I pulled her to the Athena cabin. I tried explaining the concept of gods, and godly parents and stuff like that, but she seemed to catch on quickly.

"So basically, I'm the daughter of a greek goddess, more specifically, Athena."

"Yup."

"That makes perfect sense," she told me, sarcastically, as we walked onto the porch of Cabin 6. "GAH!" She screamed.

I turned quickly, to find her soaking, and a puddle of water surrounding her. I turned behind me to see Percy and Harry, looking in utter shock. I marched up to Percy.

"Perseus Jackson!" I exclaimed. "This is the last straw!"

"It wasn't me! I swear it on Styx!" Percy cried.

Who else could it be? Anyways, I walked up to Hermione, apoligized, and gave her some towels. When she had changed into a Camp Half-Blood sweater and a pair of jeans, we went outside to investigate. It couldn't be the Naids, since the pond was too far away. It had to be someone with water powers, but Percy didn't do it. Ok, who was there. Me, Hermione, Percy, and Harry. Wait.

Something clicked. Percy and Harry both had messy black hair. They both had green eyes, and basically the same skin tone. Could it be?

"Hermione," I asked. "Has Harry seemed, stronger around water at all?"

"Well," She began. "His first full patronus was near a lake, and um, he succesfully rescued me amd, someone I forget feom underwater."

"Thanks," I told her. I had all the evidence I needed. Percy and Harry wern't half-brothers, they were twins.