A/N: Okay, I've never written a Percy Jackson fanfic, but I have this idea in my head for a while now. So, basically Percy has a sister he never knew about, and she looks up to him. Not sure about any romance yet, but we'll see where it goes.

Disclaimer: I don't own Percy Jackson. Isn't that the point of fanfiction? To write about things we don't own?

Chapter 1: My long lost brother nearly runs me over with a Pegasus

I didn't necessarily want to be a demigod. Sure, having godlike powers sounded pretty good to me, but there was definitely upsides to not having monsters attacking you everywhere you went.

That's pretty much how I figured out that Poseidon was my father.

I hurried down the street, trying to block all the noises out. The Evils were following me again, buzzing around me like flies.

"Don't you have someone else to make miserable?" I lost it and tried to swat the Evils away.

"Nope. You have such nice reactions to us though." Jealousy hovered in front of my face. I swatted it away again, to no avail.

"Why do you have to be such pests?" I muttered.

"It's what we do! Besides, you have the pithos." Poverty whispered in its raspy wheeze.

"For goodness sakes, just call it a box! That's what it is, isn't it?" I felt the pithos grow heavy in my backpack.

"Technically, it's a jar." Lust corrected.

"Holy Harpies… Does it really matter?" I snapped, causing a few strange looks from the passing pedestrians and joggers.

"Someone is getting angry…" Anger said in a singsong voice.

"Put a cork in it." I grumbled.

"Make me!" Anger whined. I sighed. Arguing with the Evils was useless.

I wasn't sure I found Pandora's Box, but now I really wish I hadn't. Actually, I was pretty sure it had found me. Now I had the Evils hovering around me like paparazzi and I had resorted to letting loose to Hope, who still wouldn't talk back to me.

"Ooh… now she's not talking to us. She must be mad." Pride said smugly.

"Oh hush. The least you could do is let me focus on getting around." I hissed.

"What's that?" I heard Gluttony ask.

"It's not a hot dog cart, I can assure you that." I rolled my eyes. At least Gluttony was helpful for when I needed to look for food. But then I saw it.

A dark, menacing shadow walked into an alley. My curiosity got the best of me and I followed it.

"Curiosity got the best of Pandora…" Anger sang.

I quickly overpowered by a giant figure. Vicious teeth lashed at me. I rolled out of its grip and found myself facing a giant, snarling hellhound.

"I'd watch out if I were you." I spun around to see a boy with dark hair and olive skin carrying a huge dark sword.

"Ooh… a son of Hades? This is one of yours isn't it?" Hate teased. I tried to pin it to the ground, but Hate flew right back up.

The boy gave me a strange look and slashed at the hellhound, making it disintegrate into a pile of yellow dust. I watched in awe as Anger and Hate flew around him.

"Mm… Nico di Angelo? You know your father made me." Hate hovered around the boy.

"Hate, back in the box. Now."

"Pithos. Besides, that hasn't worked the last twenty times. What makes you think it will work this time?" I narrowed my eyes and gave it a death glare, but apparently death glares don't affect Evils in any way.

"These are with you, I presume?"

I sighed. "Well, they haven't left me alone, so yeah, I guess."

"Hmm… you have Pandora's box?"

"Pithos!" I flicked Envy out of the air for that.

"Well, that's what it is!" Envy whined.

Nico gave me a quick inspection then frowned. "What's your name?"

"Myka. And I would think your name is Nico?"

Nico took a glance at Hate, who was asleep on my shoulder. "Yeah, that's me. You can see them, can't you?"

"Not only can I see them, I can hear them, too. All the time." I grinned unenthusiastically. "Aren't I lucky?"

"Hmm. Do you know that you're a-"

"Demigod? I've been called that a few times. Actually, I think a horse did once." I paused a moment. "That was kind of weird actually…"

"Why aren't you dead?"

"Um… should I be dead?" I looked down to make sure I wasn't bleeding internally or anything like that. "I'm pretty sure I'm alive."

"She's one of the Big Three!" I heard Anger sing.

"Not Zeus or Hades either!" Hate added. "You know what that means!"

"No, I have no idea what you're talking about! What are the Big Three?" I tried to catch Hate and Anger, but they slipped out of my grip once again.

"Here is probably not the best place to explain. We should get to the camp before any other monster comes." Nico put his sword away.

"Ooh… can we come to the camp too?" Envy pleaded.

"Wait, what camp?"

"You'll see. Shadow travel is probably fastest, but thankfully Camp Half-Blood is only a few blocks away…"

"Shadow travel?" I asked unsurely.

"Er… yeah. Just… hold on." Nico took my hand.

"Why?" I was interrupted by the sound of my own voice screaming. I wasn't a little girl anymore. I didn't scream much. Well, this was an exception.

We ended up on a big hill with a sole pine tree overlooking it. I saw a Greek looking arch with the words 'Camp Half-Blood' on it.

"Nico, where are we?" I looked to Nico, but he was passed out on the ground. Just great, I thought.

I lifted him up and half-dragged him to the camp entrance. Gosh, he was heavy for being so skinny. Either that or I hadn't lifted anything in the last few days. Although, the pithos was fairly heavy…

"Incoming!" I heard someone yell from above us.

I spun around, expecting to see a horse or something, and I did. Only this one was black and it had wings. And it was coming straight at me!

"Wah!" I ducked down to avoid it.

"Sorry!" I heard a friendly male voice call out. Yeah, that doesn't really help the fact that you nearly took off my head, I thought.

"What's wrong with Nico?" A boy with black hair and green eyes like mine came by my side.

"Well, he did this shadow traveling thing and-"

"That explains it. I'm Percy, by the way." The boy held out his hand.

"Myka. Tell me. Where am I?" I shook his hand cautiously.

"Camp Half-Blood. Home of-"He stopped talking for no reason.

"What is it?" I swatted around to make sure none of the Evils had come out of the pithos. HE pointed over my head.

I looked up to see a floating green trident hovering over my head.

"What is that?" I tried to get it off my head.

"That means that you're my sister. May I present, Myka, Daughter of Poseidon."