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PREVIOUSLY:

  Taking a deep breath, I stepped through the portal that would take me to my dad and brother.  

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As I landed on the other side of the portal, I noticed I landed in the shadows of a training arena in Atlantis. I lifted my bag higher and watched them train. As they finished, I started clapping but didn't leave the shadows. I made sure my hood was up and my mask was on.

"Who goes there?!" Poseidon asked in my general area.

I walked out of the shadows chuckling. I looked at Perce. "Wanna spar?" I asked him hopefully.

He chuckled at me. "Sure, and I never caught your name after defeating Kronos."

"How about if you win, I tell you my name. If I win, you tell me yours while you still benefit." I suggested.

"Sure..?"

"Lets start!" I yelled excitedly.

We both got into our stances. In less than a minute I had analyzed his stance while he was still analyzing mine. Taking advantage of his distraction dashed forward and slashed at him. I grazed his arm. It would have been worse but he realized what was happening before I could get it deeper. He tried to attack but I parried. I feinted an attack that he fell for. I knocked him down and held my sword at his throat without it touching him. Overall, the fight lasted a minute or two.

"Yield?"  I asked him. He nodded in shock and I helped him back up. I put my sword up and looked at him, waiting for his name although I already knew it.

"My name is Perseus Achilles Jackson, and how do I benefit from this?" he asked.

"Well, Father does too but..." I trailed off, hoping they would catch my hint.

"How does Father benefit as well?" he asked. I sighed. 'Still a Seaweed Brain'  I thought. Father, however, caught the hint.

"A-A-Autumn?" he managed to stutter out. I turned around and grinned at him.

"IIII'MM BAAAAAAAACK!!" I exclaimed, throwing my arms out while chuckling.

His eyes widen and runs to me, crushing me in a hug. Once Percy processed it, he came running at us and joined in. I chuckled and whispered into his ear "Happy Birthday Percy".

He looked shocked that I knew, then realized we were twins, face-palmed, and whispered back "Happy Birthday to you too Lia."

I suddenly started to give off a faint ocean blue glow, and both of them pulled back, confused. I chuckled at my mother's antics. She had told me she was my real mother a while back. Poseidon knew who she was. I looked at him and mouthed 'Mother and her antics'.

When I was done glowing, I slowly floated back to the ground. I still had my mask and cloak on, but my cloak was now ocean blue rimmed in purple. I was wearing a sea green dress with ocean blue and praetor purple decorations. White seashells wrapped around my waist, almost like a belt. I wore no shoes, but it didn't matter to me.

I heard conch shells blowing, and looked at Percy confused.

"I always have two friends over for our birthday. Apollo and Artemis, twin siblings of Zeus and Leto. They always come over and spend a night, but they leave early the next morning but don't return home."

I grinned at him. "Arty and 'Pollo are here?" I ask excitedly. 

"Yeah, Artemis HATES when people call her Arty, even when her feminine  friends call her that." He explained.

"Oooh uhhhhh weeeeeeeeellllllll.." I stuttered.

"Let me guess, only you can call her Arty?" he asked. I nodded my head. "But how do you know them?" he asked.

"They are my only friends from Earth. I only hear about Earth when I'm on missions and when they come. Now can we PLEASE go surprise them with me being here?" I asked him. He grinned at me.

"Of COURSE! Lets gooooooooo!" he exclaimed, dragging me along. We approached them and I stayed in the shadows, watching them.

Artemis looked around with an arrow notched, Apollo doing the same. I chuckled and stepped out into the light. They saw me and gasped.

"Who are you?" Apollo asked.

"Aw my best friends don't recognize me?" I asked them. They grinned, ran over, and hugged me. They looked at me with questioning looks. I sighed and started to explain.

A/N Tiger2627 , your character comes in in a chapter or two.