Disclaimer: I don't own Percy Jackson & the Olympians or Naruto. Percy Jackson & the Olympians and Naruto are the property of Rick Riordan and Masashi Kishimoto respectively and are not my intellectual property. There is no financial gain made from this nor will any be sought. This is for entertainment purposes only.

-|Butterfly|-

White smoke explodes and disrupts the calm of the moonless night with a small *pop*. The smoke parts and reveals the form of a young woman curling in on herself.

Blue eyes snap open as she gasps and her lungs fill with the cold night air. Her long lashes blink and flutter as she steadies her breath. Darkness gives way to a blur of dull color. Blobs of dark green sharpen into a forest canopy, starlight peeking between rustling leaves.

She springs up to a seat and examines her hand. A soft angled brow raises in thought. Her pink lips curve into a small smile.

"I'm alive!"

She delays her celebration and gives her left leg a hard punch and then looks at herself. Her smile widens into a grin even as she winces from the pain. She didn't dispel! She is alive!

"One last check." She brings her thumb to her lips and cuts into it with her canine. Her breath holds as she inches the thumb into her line of sight and sees… blood. She has blood! "Hell yeah! I'm awesome!"

She laughs. It took forever, but she is alive. She earned her existence into this world. Yeah, it isn't her world but isn't that why they made the gamble in the first place? For her to be unbound?

She shakes her head and clears her mind of the past. "I am unarmed, nude, broke," *grumble*, "and hungry. If I want to continue the whole being alive thing, I gonna have to fix that first." She can celebrate her impossible accomplishment later.

She grabs hold of a nearby branch and steadies herself upright. A soft, serene smile settles on her face. She takes an unsure step forward and falls with a yelp, the branch snapping under her weight. She glares at the sapling that caught her long blonde hair. With a harsh tug, she frees her golden locks and makes a second attempt.

On two feet, her arms stretch out beside her for balance. Her heart beats a steady rhythm and her lungs breathe the crisp night air. She takes small, slow steps forward on the soft grass. Shaky steps become a steady walk which turns into a speedy sprint. She leaps upward, but her attempt is short, and her face smacks against the branch.

"Owie." She rubs her sore bottom and pinches her red but not broken nose. She stands and glares at the offending tree and places her foot on its trunk. A frown spreads on her face when her foot slides down against the mossy surface. She steps back and places her palm against the tree. "No chakra." With her sudden limitations, she weighs her options. She settles for searching for high ground before she decides on her next move.

She weaves between and under branches, mindful of her hair. Her feet spend more time in the air than on grass and spongy earth. The first high ground she spots is a hill. She slows to a walk, half a mind to head back and explore elsewhere, but the Uzumaki are stubborn people. She is no exception, and she continues forward. A light resistance stops her just as she sees the strawberry farm below the hill. "A barrier."

She tilts her head and perks her ear in curiosity like a fox. The wind is off. It lacks turbulence the hill should have created. She takes a few sniffs. The sweet, fruity aroma overpowers most everything else, but it is... generic. "An illusion?" She presses her palms together and concentrates. "Release!" Nothing changes. "Oh, right. No chakra." That or her body doesn't know how to use chakra. Either way, she can't break the illusion by herself. There's no one else to disrupt her chakra flow with theirs through body contact. Her mind returns to the barrier.

Are the barrier and illusion related? If she breaks the barrier will the illusion falter as well? Her eyes roam the hillside. There are no signs of a seal array or device. She shrugs. "When in doubt, punch it!" She thrusts her right hand through the barrier with little resistance. This is either a weak barrier or it is not tuned to repel her. Can she adjust her form to something keyed to the barrier? Without chakra, she'd have to sacrifice body mass for the effort. Her physical shell is new and should still be malleable enough to make small changes.

She closes her eyes and focuses inward. After a while, she can sense her body shrink into adolescence. It is best to avoid aging down too much. These people could be hostile. She lets out a relieved sigh when she sees the barrier stops reacting and the illusion starts fading.

She pulls her arm away and drops it to her side. "Wait, what?" She can feel a trickle of chakra in her system. It is minute, enough for simple techniques but not much else. She frowns. She did not intend to regain her chakra. Her form will stay malleable for a day if not a week. She looks down at her younger form. The trade-off for more chakra is not worth further changes. Defending one's self as a teen is harder than as an adult, but it is much harder as a child. It's why she didn't change when she found out about her lack of chakra. "So, why?"

Her focus was on matching what the barrier would ignore. Is chakra flow needed to pass the barrier? Does this world have chakra? Her eyes drop to the structures below the hill. Perhaps someone inside can tell her about it.

She moves forward, but before she can go any further a cacophony echoes in the forest. In a distance, four figures burst out the tree line, three teens and a child. Monsters emerge from the foliage, nipping at their heels. Without hesitation, she bursts to a sprint down the hill. She won't sit on the sidelines and let a bunch of kids gets torn apart!

She spots a bat-winged creature swoop towards the tallest kid. "Dynamic Entry!" Her flying kick intercepts the attack. Before it can crash to the earth, she leaps off and ax kicks a large black dog before it leaps at the teen.

One of the four, a blonde teen moves beside her, holding a golf club in front of him like a sword. Another winged-beast flies at them. This time, the boy intercepts the creature by striking its head. The earth trembles as more large dogs emerge from the forest.

She grabs his shoulder and motions for him to pull back. She suspects the barrier is for things like these creatures. The goal is not victory but survival. "Come on. Time to retreat." He gives her a questioning look and speaks words she does not understand. "Great." She tugs on his shoulder once again, and, with hesitation, he moves back before they break out in a mad dash.

They are almost passed the middle of the hill when the whooshing against the wind alerts her. She pushes the boy aside as a dog lunges to chomp at him. Its bite catches her right arm. In reflex, before it can think of dealing more damage, she slams her right knee to its throat forcing it to let her go. She then spin kicks the large dog away. She checks the injury and bites down a curse.

Her reduced chakra reserves, a drop in the ocean, hinders her style. It prevents her from using her signature attacks, the Kage Bunshin and Rasengan. Her female, underage, undertrained body is another issue. She is more of a high endurance, heavy hitter. Or rather she was. This body has less muscle than what she had before, and she doesn't have enough chakra to compensate for it.

She rolls forward as another bat-winged creature dives after her. It rears for another attack but struggles against the barrier, like a strong wind pushing it back. As she rights herself, she sees it making ground, inching in further. The barrier won't be enough.

Two of her new companions hold their ground beside her. They shout at their two other friends to either run to safety or call for help. Maybe they are saying both. They are telling her something too. They way they eye her injury tells her they think she should retreat too.

Her eyes harden with determination. She doesn't know who these kids are, but she won't abandon them whether they want her to or not.

She sees the flying creature prepare its second attempt to crash through the barrier. The two beside her move forward to intercept. They have the right idea. In the midst of the barrier is the best position to hold ground. The rustling of trees and howling from a distance tell of more coming soon. These kids and herself can't hold ground much longer.

She glances back behind her then focuses on her good arm. She gathers every drop of her chakra to her palm, but she can't draw enough to be visible. Her breath becomes heavier and heavier. She hopes that this is enough to both kill the monster and create a loud bang to call for reinforcements.

She sees the thing pass the barrier and dive straight for the girl. With the last of her strength, she leaps over the girl and slams down the invisible chakra ball. The last thing she hears is an ear-shattering boom. White blinds her vision before unconsciousness takes her.

-|Alias|-

Chiron, a middle-aged white centaur with thinning brown hair, stares out from the deck. He ponders the events that transpired and the implications they bring. A half-blood of the eldest gods. Thalia Grace, a daughter of Zeus, had entered the camp along with her companions. Shall reach sixteen against all odds. Less than four years from now. Olympus to preserve or raze.

Then there is the mystery guest asleep in the infirmary. She's not a demigod although she could pass off as one if he believes the three demigods and one satyr. Perhaps a legacy? Legacies are a second or further generation descendant of gods. Divine lineage gives special abilities but each generation diminishes in power. The scent that attracts monsters is relative to one's power. First generation descendants of the gods attend Camp Half-Blood as they are the most at risk. Legacies, compared to demigods, have little need of Camp Half-Blood's protection and training.

A loud exclamation inside the Big House interrupts his thoughts. The large, sky-blue house serves as the camp's main administrative building and infirmary. He enters the infirmary, and he quirks a brow at the scene. The girl is awake. She circles Argus with wide-eyed innocence. He takes an intentional, audible step forward before she pokes the hundred-eyed security guard.

Her attention snaps towards him and her eyes roam him with the same child-like wonder. Those bright blue eyes stop at his bow and quiver, quick enough for most other men to miss. A threat assessment? Even now her eyes dart every few seconds. If he were to give a guess, he'd say she is also assessing the room.

Then her eyes stop and look into his eyes. Her gaze is so deep, he wonders if she is looking at his soul. In the briefest of instances, his heart flutters as if afraid to fail a test of worth. His body stands straighter on its own as if to accept this challenge. Her face breaks into a wide smile and exclaims a loud greeting, and the spell lifts.

Or what was most likely a greeting. She seems to speak in an Asian language, likely Japanese. "Forgive me. I'm afraid I do not understand." She seems intuitive enough to get a gist of his meaning if the affirmative tone of her response is anything to go by. He gestures to himself, "My name is Chiron," then gestures to his left, "and that is Argus." She mouths the words 'Chiron' and 'Argus', almost whispered. Intuitive indeed.

He gestures to her. "And what may your name be, miss?" She opens her mouth as if to speak but stops midway. Her face scrunches up in thought, her hand to her chin. "Shee. No. Boo." The words come with uncertainty before she nods to herself. "Shinobu. Himura Shinobu." His eyes narrow at the alias. For what reason would she need one?

-|Initiation|-

"New blood." His paternal half-siblings' chorus attracts his attention. The pair directs his gaze towards a young girl dressed in the orange camp shirt. The small blonde girl skips and hums beside Chiron as the centaur trots to the cabins. They look at each other with mischievous grins. They couldn't conduct their initiation ceremony to the last three demigods that entered the camp. The sons of Ares will save them for later. This new girl is their new target.

They stalk the pair for a while. Children of the war god prefer direct approaches, but the centaur's presence deters them. They don't delude themselves on their chances against Chiron, the legendary Trainer of Heroes. The trio waits until he leaves the girl with a son of Apollo near the hearth.

"They are going over… foreign poetry?"

He rolls his eyes at his companion's question. "What do you care?" The scrawny ones always overthink. "Let's grab her before Chiron comes back."

He moves from behind the marble statue, poor cover considering his size, into the open. His companions follow his example and march by his flank. As they approach, she stands up and turns to face them. She waves at them and smiles, giving them a loud greeting unintelligible to their ears. He stops in his tracks but continues forward when the boy beside her inches backward. She raises a brow at her companion's distress.

"Whatever. Go!" They charge at her. He spreads his arms to his sides for a tackle, but she leaps over him. Her palms slap his back. The corner of his eyes sees her flip continue and ends with a twist so she's facing them when she lands. They stop their face-first fall into the hearth, but with don't escape minor burns. His fists clench not at the pain but at the smirk on her face.

The smallest of them darts forward, but he grabs him back. His two companions turn to him in confusion. A hint of a smirk edges at his frown. He returns his gaze at the girl bouncing on the balls of her feet, her fists out in front of her.

"I didn't expect the new girl to fight back." His smirk grows into a full grin. "This might be more fun than I expected." The large muscular teen steps forward. His two companions roll their eyes and give him the finger, but they stand aside.

"Sure. You can have this one." Despite their words, both are still ready to jump in if needed.

He cracks his knuckles and rolls his shoulders before holding out his hands in front of him.

The girl responds with a shout and a charge. He catches her right first with his left but winces at her surprising power. "If you were a boy that might have hurt." His hand engulfs and tightens around hers. He blocks her high kick with his other arm. He uses the same arm to catch the offending leg in a hold between his arm and his rib. With hand and foot caught, he twists to the right and throws her in the air.

Instead of crashing on her ass, she continues her momentum into a flip and lands on her feet. His heart races with excitement. Despite her size and delicate features, her movements scream combat experience.

The girl frowns then sighs. To his surprise, her stance shifts. Her body faces to the right. She lifts her left arm forward and slides her right leg backward, legs apart and her knees angled. Her right hand at stomach level. Her fists loosen to open palms.

A twinge of disappointment touches him, but he nods in respect to her acknowledgment. She cannot win a battle of strength and brutality.

She speaks and motions with her left. Though he can't understand her words, they understand her gesture. Come and get it.

Blood rushing through his veins, he accepts her invitation and charges. He swings his right fist forward, but her left pushes it by the elbow, forcing him aside with his own momentum. Before he can recover, her right strikes like a dagger. Pain explodes from his armpit, and he does not register her hammer fist to the back of his head.

He doesn't remember his fall. Grass obstructs his vision, but he can see her back turned away from him to the remaining two. She points to them. Her shouts penetrate the haze, but the numbness grabs him. He sees his companions smirk then charge before unconsciousness takes him.

-|Headaches|-

When the young child returns to the Big House rather early with one black eye and a limp on her left leg, Chiron knows something has happened. When she gives a nervous laugh, her unbroken hand scratching the back of her head, he knows that something would be a headache to deal with. When the noise of other children approaching causes her to hide behind him, he knows that she is at the center of it all.

Indeed, seven from the Ares cabin are out cold. Though rumors say two were self-inflicted. Apparently, two had the bright idea that if they couldn't bring in the girl for her swirly, they could bring the swirly to her. They then proceeded to tear out one of the toilets. The plumbing sprayed out. They slipped and knocked each other out with knees to their faces. The remaining five Cabin 5 members are most definitely her handiwork.

All seven from Cabin 5 have fractures. One lost his nose – which Shinobu regurgitates - and two suffer concussions.

The Cabin 11 member suffers from an unknown ailment.

Monsters injured three from the Hephaestus cabin during a patrol.

The young hyperactive blonde girl joins them in the Big House.

Sure enough, the children of Ares – the conscious ones – call for a rematch despite their injuries. The girl is not blameless as she accepts the issued challenge with gusto.

With the increased attacks on the camp, and the with Great Prophecy looming overhead, the headache of dealing with such is simply one too many to add to his plate. In the end, Chiron gives a small prayer to Hermes, in part thanks to his acceptance policy and in part apology. The Hermes cabin always takes in those not accepted by the other cabins.

He does feel guilty for the girl as well. She needs rest and recovery, but the crowded Cabin 11 is still less rowdy than the Big House. He hopes none from Cabin 11 starts a fist fight with the injured girl, for their sakes.