Hey Guys,

So I just really want to start off by thank you guys soo much! A lot of you guys reviewed on my other story, Return of Nancy Bobofit, and they were all so so so sweet. I love you guys so much and I can 100% say that you guys make my writing life worthwhile. Starting this out, I did not think anyone would really like it or be like, "wow she so innocent. ew!" But I really can't believe this! You guys have no idea what this means to me! You're all amazing and please please please keep doing what you're doing because you make me soo happy!

So basically, after I read the reviews I really wanted to celebrate by writing my first chapter story! So I was racking my brain off trying to think of something for you guys and finally found one! I've always wondered how different things would be if there was another child of Poseidon (no I have not forgotten Tyson, but he's a cyclops so he doesn't count.) So I decided to take my curiosity and write you guys a story!

Disclaimer: Still don't own PJO or HOO (SADLY!)

Annabeth POV

"No Percy! That's not how it works!" I yelled trying not to smile but ultimately failing.

"Oh really Wise Girl, tell me it's not!" Percy yelled with a smug face.

"I literally just did!"

"I'm sorry I didn't hear you." He lifted one hand and put it over his ear. I stifled a laugh. I took some sand in my hand and looked at my boyfriend. Not suspecting a thing. I slowly raised my hand and shoved all the sand into his ear. He ripped away from me and looked shocked. I was laughing my head off. His face turned from a pout to his signature trouble-maker grin. "Oh, you are so going to get it, Annabeth Chase!" He yelled. I did a fake scream and got up, running away from my loving Seaweed Brain. "Get back here Wise Girl!" I heard Percy scream from behind me.

"Did he really think I'm that dumb?" I thought. The First rule of battle strategy: When running away from a monster never ever look back. Well technically the first rule of battle strategy is: never get distracted, but that's besides the point. I was not going to fall for that. "You gotta catch me Seaweed Brain!" I yelled behind me.

"That can be arranged." At that moment I felt two giant hands come out of the water and wrap around my waist. They lifted me up and started carrying me to the water.

"Perseus Jackson put me down!" I yelled struggling to get out of this water's grip.

"Ok, as you wish my lady." I heard Percy say. Suddenly I was dropped and fell straight into the water. When I broke the surface I saw Percy standing next to me in the water, smirking at me. "Got ya." He said. I splashed the water in his face. Sadly he wasn't bothered by it at all.

"Stupid son of Poseidon," I thought. "You are so annoying, " I said, my anger present on my face. He gave me a crooked grin making my insides melt.

"Well, that's my job in life, to annoy you, Ms. Chase." He said trying to pull me into a hug. I pushed him away, even though I was smiling ear to ear.

"Don't touch me, Jackson," I said turning my back to him.

"Aw, come on Annabeth, don't be like that." I felt his big strong arms wrap around my waist, giving me this secure feeling. Like nothing could ever hurt me as long as I was with him. But of course, I didn't show it. I just kept looking the other way.

"I said don't touch me Percy!" despite what I said, I didn't try to push his arms away.

"Beth, I was just kidding." I felt his chin rest against my shoulder.

"Nope!" I kept my eyes locked on the horizon.

"Annie," I felt Percy start to kiss my neck.

"Stop that!" I said. But of course, he didn't. He continued to kiss me.

"Have I ever told you I love you?" I sighed. I had to give in. I turned around and kiss him on the lips, but pulled away after a few seconds, much to his dismay.

"You have," I said while wrapping my arms around his neck.

"Good, cause I do… a lot." We both leaned in for another kiss when.

"Bang." We both broke away from each other. We both looked around, not seeing anything. It was dead quiet.

"Percy we need our weapons." He looked back, our weapons were on the beach next to our blanket.

"Yeah, ok." He turned but then something came flying across the water. It skipped 6 times before it finally landed. Percy put his arm in front me protectively. Suddenly whatever was hitting the water, broke the surface. I squinted to see what it was.

"Big mistake! This is my domain!" It was a girl! She was wet, covered in bruises and scrapes. Her hair was a rat's nest like she hasn't slept in weeks. The clothes she was wearing were all ripped. The sleeve of her jean jacket was ripped so it looked like a tank top on one side, there were a bunch of holes in it, and when she turned the back of her jacket had a ginormous claw mark on it. Her once white jeans were torn and covered in dirt and blood. I stared in awe at her. She was clutching a light blue sword, the entire thing looked like it was made of ice like if you touched it you would freeze. "Bring it on!" Right then, a giant hellhound bounded into the water, its eyes read hate and anger. The girl readied herself, her sea-green eyes narrowed. The hellhound pounced at her, snarling it teeth. The girl waited.

"What is she doing?!" Percy yelled. I thought the same. She was cutting it awfully close. If she didn't move soon she'd be on her way to Hades. The hellhound was a foot away from her when she started to rise. I couldn't believe what I was seeing. The water swirled around her and propelled her upward, making her jump 20 feet in the air. We watched as she lifted her sword above her head and stabbed the hellhound in the head. It howled in pain and turned to dust. The girl landed in the water. Percy and I stood there in awe.

"How did she do that?" I thought. Then everything seemed to slow down. I watched as the girl started to fall over, dropping her sword. "Percy go!" I yelled.

"Right right." Percy swam out to where she was in seconds.

Percy's POV

I wrapped my arms around the girl, bringing her close to my body. Unfortunately, her hair was covering her face so I couldn't see her facial features. My brain filled with so many different questions like, "Who is she?" or "How the heck did she do that with the water?" I slowly picked her up bridal style, making sure she wasn't uncomfortable especially with all those injuries over her body. As soon as I picked her up immediately her head rested against my chest. I couldn't help but feel protective of this girl like I would stop at nothing to make sure she was safe. I saw Annabeth waving me down, telling me to come back to shore. I pushed any feeling I had inside and willed the water to push me and this mysterious girl back to shore. Once I got there I laid her down on the sand. Annabeth rushed to the other side of her. I watched as my girlfriend put two fingers on the girl's neck.

"She has a pulse, but it's weak." I trusted Annabeth, I wasn't good with medical stuff. "We should take her to Will." I nodded, picking the girl up again. Her arms hung limply beneath me.

"What about you?" I asked.

"I'll be right behind you, I just have to clean up our mess over there." I smiled.

"Thanks, love you." I gave her a quick peck on the lips and started running towards camp.

"Move! Get out of the way!" I yelled running through the crowd of campers. "Will!" I yelled as I ran into the infirmary. Will walked through the infirmary towards me, Nico not far behind him. Nico and Will have been dating for about two months, after the Giant War.

"What happened? Who is she?" Will asked.

"Don't know…" I was out of breath. The girl wasn't heavy, just running up from the beach to the infirmary caring a girl was tiring.

"Put her down there." Will said walking over to the side of a cot. I laid the girl gently down, making sure not to be too rough with her.

"Will, she'll be ok right?" I asked. It was weird, I was truly worried for this girl and I didn't even know who she is.

"I don't know, she seems pretty banged up, but I'll do my best." He said, obviously focused on the girl. I backed up and stood next to Nico. I felt his hand on my shoulder. I looked at him, and he gave me a reassuring look.

"Will's going to heal her, she'll be fine Perce." He said.

"Thanks, Nic, I don't even know who she is," I said.

"Well, she kinda looks like you ya know."

"What?" I looked at him.

"Nothing, nevermind." He said looking away.

I stared at him confusingly. "What did he mean?" I thought.

"Hey I got Chiron, is she alright?" Annabeth asked running in Chiron not far behind her.

"Yeah, she's going to be fine, but her injuries are pretty bad. Even with nectar and ambrosia, she's going to need at least a couple of hours to heal completely." Will said standing up. "I've done all I can for now." I nodded.

"Thanks," I said, he nodded back at me and gestured at Nico to leave. As Nico and Will walked out, Chiron turned into his horse form.

"What happened?" He asked. I let Annabeth explain.

"Percy and I were hanging out at the beach when we saw this girl flying across the water. A giant hellhound, bigger than Mrs. O'Leary, it sprang after her, but the water rose and it propelled her over the monster and she killed it. Then she fainted most likely cause of her injuries." Annabeth finished.

"The water propelled her?" Chiron asked. Annabeth and I nodded. "But that's–" he didn't finish because the girl on the bed started to wake up. I kneeled down next to her. She opened her eyes, and I saw her eyes were identical to mine.

"Strange?" I thought.

"Where–ah!" She screamed clutching her stomach, falling back down onto the cot.

"Don't sit up, you might hurt yourself more," Annabeth said putting her hand on the girl's shoulder. The girl nodded. Weird, Annabeth is never this nice to someone.

"Uh… Miss… who are you?" Chiron said, walking over to the cot. She looked surprised for a second but replaced with a soft smile.

"My names Ariana, but you can call me Aria." She answered. Chiron nodded. "Uh… where am I?" She asked looking around.

"You're at Camp-Half Blood," Annabeth answered. Aria nodded. "What's the last thing you remember?" Annabeth asked.

"Um… I was fighting a hellhound and I killed it… and that's the last thing I remember." She said rubbing her head.

"Can you tell us why you were in this area?" I asked. I'm sure you're thinking, "What a stupid question Percy. She's here because she needs protection."

"Well all I remember is I was in California, I'm a student at Stanford University, and I was on the beach in San Francisco when a trident glowed over my head, so I followed it. I've been following it for three weeks now. It finally disappeared when I got to Long Island but then a Hellhound attacked me, and I'm guessing that's how I got here." She gestured to the room and bed.

"She's a child of Poseidon!" I mentally yelled. I was about to ask her when Annabeth beat me to it.

"Did the trident thing tell you anything?" She asked.

"Wow, if a mortal heard that they'd be so weirded out!" I thought

"Uh… well, it asked me to find someone. Um… his name was Percy Jackson." She said. "Do you know him?" She asked. I was froze.

"I um… I'm Percy Jackson." I said nervously.

Aria, a girl I've never seen before, did something I didn't expect. She pulled me into a hug. She wrapped her arms around my neck. I was more than confused but on instinct slowly wrapped my arms around her too. I looked around at Annabeth and Chiron. They both shrugged at me. She broke the hug off and looked at me.

"I'm sorry it's just… uh, Percy… I'm your sister."