Disclaimer: Standard disclaimer applies.

Warning: Slight Canon-AU, and Major Spin in Some Characters' History

Note: This idea is derived from four things: gender bending + Tyki as a good guy + Neah being his awesome self + supernatural theme.

Prologue

A young girl stood before a young man with dark colored hair and amber eyes, neither speaking as they continued to eye at each other. Waves of defiance flared in the young girl's eyes for another few seconds until she let out a defeated sigh, and nodded with a pout appearing on her expression. At this notion, the young man merely let out a triumphant smirk as he crossed his arms, and ignored the young girl rolling her eyes distastefully at the situation.

"I believe I won, darling niece," the older male stated as he sat back in his seat, and his tone sounding innocent and playful despite the seriousness of the situation. "Besides, we all had to do it when we were your age, and we turned out fine, so there is nothing to fear," he added solemnly.

"But uncle!" the young girl insisted as her long dark chestnut brown hair bounced with her movement, and her azure eyes pleading to him. "You know as well as I that human world is rather… unappealing to say the least. Is this…punishment… because I broke your favorite vase? It was an accident, I swear!" she continued.

Her uncle rubbed his temple as he inwardly tried to phrase his next sentence carefully, and finally stated, "Darling, it's not about the vase. All of us had to go to the human world for a certain amount of time, and mingle with them. It's the Rite of Passage to become a full-pledge being; however, because you take after your mother more, your grandfather wanted your brother to go with you for your test… just in case."

"So it is about the vase," the girl muttered under her breath as she continued to pout and scowl. She then let out an exaggerated sigh, and finally conceded to what her uncle was saying, "Fine. If I must, I'll go; but Nii-sama is coming with me, right? He has to!" It seemed she did not bothered to listen to her uncle's last statement.

"Of course," another male voice stated from behind the young girl, seemingly appearing out of nowhere. He then hugged his sister close him as his amber eyes briefly glanced over her body to make sure she was unharmed. "After all, I have to make sure that those unruly mortals do not ever so much as glance at my darling sister," he stated with a scowl marring his expression, and spat out the word 'mortals'.

The young girl's uncle chuckle at the short monologue, and added with a sly grin, "Actually… Ailin, grandfather said that you're to go disguised as a boy until your 16th birthday."

"What!" the young girl, Ailin, responded in shocked and surprised.

"Absolutely not! I forbid my sister to look like a boy!" her brother immediately retorted as he narrowed his eyes at their uncle, and added fumingly, "Uncle Neah, what in the world were you thinking, agreeing to this absurd deal?"

Neah, once again, massaged his temple as he inwardly wondered why in the world was he the one to report these kinds of news to Ailin and her brother. He had a nagging feeling that Ailin's brother was overprotective of his only sister ever since they had found out that she was… let's just say, different. In a good way, of course.

"She can't forever be sheltered, Tyki," Neah addressed to the two siblings, and inwardly let out a smile when he saw that Ailin was in a protective embrace of her brother, "And what if there comes a time when we can't protect her? What will you do then? I'm not saying I agree with grandfather's method, but darling niece needs to learn about her powers and how to control them. Of course, you and I will be there to watch, guard, and guide her."

Silence blanketed the room as no one spoke for a few minutes, as the two siblings tried to digest the information. Finally, Tyki said as he kneeled down and glanced up at his sister, "Ailin dear."

"Yes?" she responded with puzzled expression, silently wondering why her brother sounded so serious.

"Promise me. You must never, never, never fall in love with a mortal; do you understand me?" Tyki insisted as he looked at his sister with seriousness that she had not seen before. Ailin simply looked at him in confused since she did not know why he was insisting on such request, and in the end, nodded in agreement.

"Then I suppose we are to be engaged in a war between the Innocence and the Noah if we're leaving now," Tyki stated in slight amusement with a smirk portraying on his expression as he stood up. "If you don't mind, I would like to side with the Noah so I do not need to hide my powers as much. Ailin dear will be better off with the Exorcists."

"But why! I want to go with you, Nii-sama!" Ailin replied with a frown as she glanced up at her brother, and held onto his hand.

Tyki merely ruffled her hair, much to Ailin's annoyance since it took her a while to style it, and said, "I cannot ask you to kill, dear. You are far much too young and innocent to do such deed."

Neah could not help but smile at the scene, and marveled at how quickly Tyki had changed from despising Ailin to being overprotective of her. "Well then, if that is all set, we will begin with the test. Ailin, please think of your disguise, and you are forbidden to use your powers before mortals," he instructed, fully aware of her gaping expression.

"Close your mouth, dear." Tyki chided with a small grin threatening to escape from his solemnly amused expression, and added, "We will begin with your Rite of Passage at midnight. Go prepare yourself for the journey."

Ailin merely closed her mouth and scowled at the two males in the room before she headed to the large double doors whilst she muttered, "It was so about the vase." She then paused by the doorway, and glanced back to her brother and uncle. "I've decided on my name for in the mortal world," her tone radiating confidence that she did not feel.

"Oh?" that was all Neah responded with as he waited for her to continue.

"The name shall be 'Allen'; it will be easier to remember a name that is similar to mine," the young girl responded with a smirk before she walked out of the room completely, leaving behind two amused males in the room.

Question: Any thoughts of the pairing? Yullen? Laven? Poker? [If it's Poker... it'll be incest, unless you guys don't mind incest.] Or others?