Prologue

Hiei ran towards Konoha, assuming he'd see Naruto. Instead, he stumbles upon a boy with jet-black hair throwing shurikens. He seemed to have trouble. Then a young girl appears and says, "Sasy! Mother says it's time for dinner!"

"Saky! Can't you see I'm training?" groaned Sasy. (Sasuke's nickname.)

"But Aniki, mom said…"

"If you want me to come with you, then you'll have to fight me!"

"Okay! But no shurikens! We use Kunai!" said Saky…aka Sakura.

"Let's spar!" said Sasuke happily. (He knew Sakura, his twin, would probably beat him.)

By the end of their bout, Hiei whistled aloud and said, "You two aren't half bad for newbies…"

"Who are you?!" said Sasuke, spinning to face him.

"The name's Hiei. And if you were wondering, I am a demon."

"Why are you here?" asked Sakura.

"I was about to visit my student, but you two have caught my interest instead."

"Is that a bad thingor a good thing?" asked Sakura boldly.

"Depends on my mood. So how would you two like to be my new pupils? I could teach you how to fight a demon such as myself…"

"I'm in! You seem to be more trustworthy than Nii-san anyway!" said Sakura.

"What's that mean, Saky? And who were you talking to?" asked Itachi as he approached.

"It means what I said. I don't trust you Itachi-Nii."

"And why's that?"

"I don't know why. I just don't. Anyway, why are you here?"

"Mother sent me. You two are late."

See me at this same spot at midnight. Hiei said quietly next to the twins.

Hai! Sakura said silently.

At midnight exactly, Sakura dragged her twin back to the spot. Hiei was there, still as a statue.

"Sis, why'd you drag me here?" whined Sasuke.

"Because unlike you, I WANT to learn something new."

"I see she brought you here…" was all Hiei would say.

"I'd rather be sleeping!" said Sasuke in a grouchy mood.

"If he didn't want to come, then you don't have to bring him. I'll teach either one of you," said Hiei. (Sasuke was already asleep.)

"So what are you about to teach me, Sensei?" asked Saky.

"Swords…but mostly I'll teach you how to use spirit energy."

"What's that?"

"Spirit energy is something slightly different from chakra. One, once you use it all up, you'll most likely be dead. Second and most importantly, you don't need those ridiculous hand seals."

"You had me at no hand seals!" grinned Saky.

They trained until 2 in the morning; Hiei helped Saky carry her brother back to bed.

"I'll see you after school, Hiei-san!" said Saky.

"If anyone asks what we're doing, I want you to tell them that you saw me training and wanted to train with me," said Hiei firmly.

"Deal!"

The next day, Saky ran up to Hiei, eager to learn about spirit energy. Instead what she sees is Itachi, glaring at Hiei.

"What's happening Hiei-san?" asked Saky, confused.

"Your brother is annoying me. If he doesn't leave soon, I'll do something unpleasant…" said Hiei in a warning tone.

"Nii-san! Leave him alone!"

Itachi left, but not before Hiei amused Saky first by making Itachi hit himself using his Jagan, (aka Evil Eye).

"So, Saky, what would you like to do first?"

"How 'bout recover from laughing so hard?" said Saky, snickering.

"So, do you have any hobbies?" asked Hiei, bored.

"Does singing count?" asked Saky.

"Oh? Let's hear it…" said Hiei nonchalantly.

"Kuroki hateshi no nai

Yami no kaze kiitara

Shiroki eien no

Hikari no umi e

Nanairo no kake hashi

Dokoka ni kakusareta kagi

Suna takaku otozureru

Hito no shiranai seki

Toki hedateta chikai

Namida no shirabe

Kokoro kagayakasu

Asahi iro no yakusoku

Katarou

Ima aoku moeyuku

Mune no oku akasabita kabe uchi yaburi

Tobitate, nanimo kamo nugi suttee

Kegare no nai tsubasa

Ga chigireru made."

"You wouldn't happen to be related to any Sirens, would you?" asked Hiei when she finished.

"Sirens?"

"Mythical creatures who ensnare sailors with their voices."

"I don't think so. Why do you ask, Hiei-san?"

"Because you've kept my attention completely on you…I couldn't turn away, and believe me I tried to."

"Oh? What do you mean?"

"Your ninja ability may be to ensnare others with your voice."

"So? I've never thought about doing that before…"

"I can help you perfect that talent; not to mention give you an extra kick."

"How so?"

"My Jagan eye can ensnare opponents and enslave them. That's what I did to your brother earlier."

"So how do I obtain an eye like that?"

"I'll teach you when you're ready. But first, we work on your swordsmanship."

"Hai!"

They trained for hours. Her ability improved enough that Hiei started teaching her new techniques.

That night, Sasuke decided to see whether or not it was worth listening to Hiei's lessons.

"So you came after all. What changed your mind?" Hiei asked.

"Simple. I wondered if your lessons are worth attending."

"What do you want to work on first?"

"How about this reitsu stuff you were talking about last night…"

"Fine. Though it will be painful…"

"What else is new?"

"Very well…I will unleash your spirit powers. But I will cease should anything happen."

"Like what?"

"Like you receiving powers of a Siren as your sister has. She possesses powers that only a demon with Quest abilities has."

"What does THAT mean?"

"It means she can completely ensnare other ninja's attention without fail. If she were to possess the Evil Eye, she could become quite the little…"

"That's enough! Can we just hurry up already?!"

"Hit a sore spot, have I?" chuckled Hiei.

"I don't want to talk about it…"

"Is it because she has a little more talent than you? Don't worry, as twins, chances are yours are merely suppressed to protect you until your body and mind are ready."

"What?"

"You heard me. Your true talent is suppressed to protect your soul. If it were to be unleashed before you were truly ready, you would die or worse."

"Worse?"

"You don't want to know…"

"Aright, then how do we start?"

"We start tomorrow, with your sister. You need to come with her and not your older brother."

"Fine…"

"Aniki! What're you doing here?!" said Saky surprised.

"Hiei-san said I should train with you," was all he could say.

"It would be safer if an untrained Siren were here in case all hell broke loose. Your voice could easily subdue your twin."

"Why…why would I need to subdue him?"

"Because suppressed powers tend to be the most powerful. If they activate and he's not ready, it'll be bad."

"And my voice will be needed to divert them somewhere where they won't do that much harm, right?"

"Correct."

As they prepared to train, they had little idea that Itachi was watching from the shadows. Hiei's ability to sense evil auras went lax that day… As the end of the day came, Saky and Sasuke were both ready to end it.