[Percy's POV]

Day one, and my life as a big-brother is actually going pretty smooth.

Cally's not a handful, and she's a fast learner too. But sometimes... I can see why she's related to me...

"Percy?" I went to see what she did, and her blanket was wrapped around her body... She's practically tangled with the covers. "How," I gestured to her head down to her feet, "did you manage to tangle yourself with the blankets?" I asked, seriously, I'm wondering how.

Her face turned bright red, "well... I was arranging my stuff, and I slipped over my octo-plush, then I pulled on the blanket, rolling over to the ground, my whole body wrapped around in bed blankets." She smiled innocently.

I shook my head, smiling. It's fun when you have a little sister like her. Still innocent, and childish. "Come here, Cal."

She paused, like she stopped breathing. "Cally?" I walked towards her and waved my hand in front of her still face. She blinked her eyes twice then looked away. "Just, help me get the blanket off me."

I stayed quiet after she said that. I unwrapped all the blankets around her arms, body, and legs. "Thanks," she smiled, before taking the covers back. She fixed her bed and finished putting all her items in the cabinet. "So, what's the first thing we can do?"

"Well-" I was shortly cut off but the announcement by Chiron and some Hermes kid.

"ALL CAMPERS REPORT TO THE AMPHITHEATER. ALL CAMPERS REPORT TO THE AMPHITHEATER. ALL CAMPERS REPORT TO THE AMPHITHEATER."

I didn't noticed she was already beside me, tugging on my t-shirt. "Can you stay with me until I know everything?" She asked, using the puppy eyes I once used on Annabeth, but that's another story to tell on another day.

Once we were at the Amphitheater, Cally sat next to me and watched as Chiron stepped forward.

"Campers, today, we have a visitor." Murmurs began to start around the Amphitheater. Chiron cleared his throat to silence the other campers. "Of course, yesterday, we have a new camper, a child of Poseidon to be specific, but today, the Roman campers shall stay with us for a week, so please, open your cabins to welcome your Roman brothers and sisters by the time they get here."

After Chiron's sort-of speech, trumpets were played loudly as the Roman Camp, known as Camp Jupiter, marched in the venue.

"Welcome, Camp Jupiter, thank you for..." Chiron continued his speech to the Roman, especially to Reyna and Frank.

I saw our friends from Camp Jupiter, and secretly, they snuck out of their groups and sat next to Piper and Leo. "Hey guys, how are you?" Hazel asked, smiling brightly as usual. "We're good, still training like the usual past time." Piper grinned, staring at her "blonde Superman", who was next to her. "Percy has a new sister." Leo added, smiling widely as he bro-fisted Cally. "Oh," Jason and Hazel smiled, "she looks like you, Pers" Jason noted, checking Cally's face.

Hazel nodded. "Well, she's pretty like a sapphire-" *POP* A sapphire appeared in her hand, "dang it."

Cally's eyes widened, smiling like she struck gold. "Wow, how did you do that?" She pointed to the sapphire. "This?" Hazel pointed at her hand, "well, it's actually a curse of mine, and anyone who accepts the treasure I get, will get curse either with bad luck, instant death, or daily mishaps." Hazel nervously pointed out, rubbing the back of her head.

Cally's smile softened. "It's still a pretty cool ability."

"Thanks, uh..." Hazel's voice trailed off, embarrassed of not knowing her name, "Cally. Cally Lavino." Cally giggled, shaking hand's with Hazel.

Something caught my eye while the others talk about what happened to their lives after war.

A boy, probably the same age as Cally, was staring at her. He has black shaggy raven hair, and sea blue eyes, and his skin was kinda tanned. "Jason," I whispered-shout.

Jason leaned back and raised an eyebrow at me, "what?" He whispered.

"Who's that guy over there?" I pointed at the guy who was staring at my sister. Jason slightly leaned forward and took a good look where I was pointing, then he quickly leaned back, "that's Rafael Zeva, son of (Roman) Apollo. 13 years old, why?" He asked.

I eyed Rafael, who didn't noticed how I glared at him.

"I think he's staring at Cally."

... To be continued...

A/N: Part One of Two, and IDK, review, I guess? Sorry if it's short, I'm still new to writing stories :3