Disclaimer: Naruto and Naruto Shippuden are owned by Masashi Kishimoto. JoJo's Bizarre Adventure is owned by Hirohiko Araki. Percy Jackson and the Olympians and The Heroes of Olympus are owned by Rick Riordan. I own none of their intellectual properties. I only came up with this crossover idea.
Naruto tiptoed around the half-asleep chunin guarding the front gate. He stopped as the chunin coughed, holding his breath. The guard slumbered on but Naruto dared not deflate his lungs until he was several yards away from the light of the chunin's lanterns, lest he be heard.
"Lazy guard," muttered Naruto; he felt that it was stupid for the guard to be sleeping on the job, but for now, he only counted it in his favor. Up ahead, he could see a gray shack illuminated in the moonlight. Sakura always called Naruto a baka, an idiot, but could an idiot steal the Hokage's Scroll from beneath his nose and flee the Village gates? Naruto didn't think so (He was no idiot, thank you very much! He was just… bad at school).
Mizuki had instructed him to go to this outpost building, saying it was currently empty, and that he'd meet him there. Naruto sat down, his back to the old wood wall. He eagerly opened the Scroll he had stolen — ahem, borrowed — from the Third's study.
"Now to become a Genin!" he whispered, his spine tingling in anticipation. He could almost feel the Leaf headband on his forehead and envisioned Iruka and Mizuki clapping him on the shoulders in congratulations.
A crack sounded from somewhere to his left. Toward the trail, thought Naruto. A twig breaking.
"Mizuki-sensei!" called Naruto, because who else could it be? Out of the trees came a woman in a long travel cloak. She wasn't wearing a shinobi's headband, much less one belonging to Leaf.
"The little demigod thinkssss I'm Mizzzuki-ssssensssei? How amussssing," the woman hissed. Yes, actually hissed. Naruto didn't think too much about this until she stepped out into the moonlight. Or should he say slithered out? For, when the wind fanned her cloak behind her, Naruto saw that instead of legs, she had two great big snake trunks trailing below her. Naruto's mind flew between panic and run and demon and Where's Mizuki-sensei and Oh my god. But what came out was —
"What's a demigod?"
"Don't play dumb, little godling, I can ssssmell it on you!" She spat. It was disgusting. And terrifying. But Naruto is never one to stand down, even when he really should. And this time was no different.
"I'm not dumb! And you don't scare Uzumaki Naruto, snake lady!" he shouted in customary knucklehead fashion. "Stupid," he added after a beat.
She didn't seem to like that, so she hissed (again) and lunged (or slithered).
"You reek of it!" She slashed with her arms and in her hands were two hooked blades. All he could think was I don't smell that bad, do I? before she was upon him and her blades were so close and he was panicking and he was almost dead and he was so dead and —
An orange fist was flying forward. It struck Snake Lady in the face. She flew back, spinning like a pinwheel, crashing into a tree, flying through it, and crashing into another.
"Orange Hurricane!" Naruto enthused, addressing his savior. The orange figure, floating inches above the grass, turned in the air and struck a pose with a hand above his head and his feet splayed out.
"YOSH!" he bellowed. "Are you alright, Naruto!?" Orange Hurricane was rarely quiet (but no one could ever hear him, Naruto had noticed). Naruto and he called him Naruto's Spirit Guardian. Naruto nodded in reply.
"Thanks, Hurricane… What about the Snake Lady?" Hurricane turned and led the way to Naruto's fallen enemy. They passed the fallen tree and came upon her twitching form. Her snake legs were tangled and her hair was in disarray. Bits of bark stuck to her cloak and littered the ground around her. She looked up at Naruto, her breathing heavy and gravelly.
"You'll… pay for… this…" she gasped out. It hurt Naruto's heart to hate a monster who was in such pain, but she'd tried to kill him for being a "demigod," then a "godling," and he didn't even know what that meant. She'd tried to kill him, but…
"Put her out of her misery, Hurricane," he whispered. He turned as Orange Hurricane struck the Lady in the head with his massive fist, unable to watch his would-be-murderer be killed. He heard fist against head, and, if he focused, he could see through his Spirit's eyes and look down at the mutilated skull. It looked like his fist had spiraled, drilling into skin and bone and brain. Of course, it had, as Hurricane's "Spirit Power," as he called it, was Rotation Like a Hurricane. After a second, the corpse turned to dust and disappeared; all that was left was a leather strap attached to two small sleeves. Naruto stepped away and emptied his stomach all over the grass and dirt.
He stayed hunched over his vomit until his stomach settled. His throat burned. His eyes stung. His hands clenched the fabric over his knees until his knuckles turned whitish-red. He breathed in. Out. He stood. He picked up the belt.
Several feet from the Scroll laid the Snake Lady's knives. Naruto approached them. Falling to his knees, he stared at them. The blades were a curved golden bronze metal. The handles were leather-wrapped and topped with effigies of owl's heads. He gingerly picked one up. Even he, who had barely passed his weapons portion of his studies could tell it was well-balanced. The blades were sharp.
"You should keep them, Naruto. Spoils of war!" Orange Hurricane suggested. Naruto sheathed the daggers and strapped the belt to his waist. "Thumbs up!" praised Hurricane, raising the mentioned fingers.
Naruto sat down with the Scroll of Forbidden Techniques and breathed in slowly, "Yosh! Let's become a Genin!" and breathed out, already reading, despite his anguish that it was a Clone technique.
"Naruto…" growled Iruka, sounding to Naruto like he was out of breath and exasperated.
Naruto, also out of breath, chuckled proudly: "Iruka-sensei! You found me!" Leaping up, he continued. "And I've only learned one Jutsu…" He rubbed the back of his head. Iruka's eyebrows rose as he said this. Iruka always made Naruto feel like he could have done better. He was constantly pushing Naruto harder, always saying You're better than this, Naruto! and Try harder; just focus! Naruto rushed to placate him, fearing he would start lecturing him again.
"Listen, listen! I tried really hard, so now you have to let me graduate if I can do it! Isn't it true I'll graduate if I can do one of the techniques in this scroll?"
"Who told you that?"
"Mizuki-sensei," Naruto said with his arms waving above his head. "He told me about this scroll and this place…" He trailed off when he saw his sensei's face twisted in shock. Iruka stood there for a moment. Behind him, Naruto saw a dozen kunai flying from the shadows toward them.
Iruka spun around, pushing Naruto to the side, out of the line of fire. Naruto glimpsed Iruka pinned to the wall behind him before his momentum rolled him over, and he stumbled further because of the giant scroll on his back.
"I'm impressed you found this place," said Mizuki. He stood atop a branch half a dozen yards above the ground.
"I see… now," grunted Iruka.
"Naruto," called Mizuki, interrupting Iruka. "Give me the scroll."
"W-Wait, wait! What's going on?" Naruto sputtered, looking between his two sensei.
"Naruto," Iruka grunted, pulling the last kunai from his leg, throwing it to the side. "Never give him that scroll. It's a dangerous object that contains Forbidden Techniques, locked away for everyone's safety by the Hokage. Mizuki used you! He wants it for himself."
"He's lying, Naruto. He's trying to trick you. He's afraid of you holding that scroll. He thinks you're a monster!" Mizuki implored.
This put Naruto on even higher alert than before. A monster? Does he mean demigod? Godling!
"Snake Lady called me a demigod!" Both their eyes widened at this. Iruka mouthed Snake Lady.
"Well, that's not far from the truth," Mizuki said with glee. "Your father was the son of a god!"
What?! Did Naruto hear him right? A god? And his father?
"Mizuki stop!" Iruka was saying, but Mizuki talked over him.
"But that's not what I meant! Haven't you ever wondered why everyone hates you?" His smile was wide and gruesome now. Naruto was sold that Mizuki was at the very least very unstable, and at worst untrustworthy — but, why, then would Iruka be so against him telling Naruto?
Mizuki continued. "The Hokage forbids anyone from telling you, by law, but —"
"Mizuki, I'm warning you!"
"YOU'RE THE KYUUBI!" roared Mizuki. Naruto's heart stopped. Iruka slumped in defeat. "And now, Naruto the Demon, I will rid this Village of its scourge once and for all!" He drew one of his giant shuriken from his back and, spinning it ferociously, he launched it at Naruto.