I'm going to go straight to the story. So, sorry if the beginning isn't detailed.
Basic Summary:
Reiki was considered a genius in the real word. He was adopted since young, and was used as a money cow by his parents who use him with sappy words and sweet talk-on the outside.
However, Reiki could totally see through it and kind of 'rebelled' which made the fake parents show there true color and started to abuse him mentally and physically.
He had them caught in their own schemes and got them arrested, but somehow the 'crazy parents' got someone to assassinate Reiki (Reiki: They were only able to assassinate him because they had the advantage in numbers, like 30 people.)
Given another chance by God, he was given animal powers which was disguised as the 'Anima Anima Fruit', which allows him to use the abilities of basically anything that has life or get half their transformations (Example: He can produce white swan wings on his back, or bat wings, and a mermaid tail) It also includes mythical creatures which only Reiki probably knows about (since the real world has a lot of mythical creatures)
Reiki was also given the abilities to use any weapon and is quite skilled at all. (Including make-shift weapons)
Dropped off at an inhabitant island in East Blue at the age of 7 (soon 8), Garp found him and adopted him to become his grandson and send him to train with Luffy.
Instantly bonding, Luffy somehow admired Reiki a lot and is used to looking up at him as a big brother.
Starting off from there, onto the story~
Reiki's POV:
"That kid is seriously starting to weird me out.."
"Can you believe a boy can look so pretty?"
"Oi! Back off you pedophile! Vice-Admiral Garp is going to have you head!"
"He seems to take a really big liking to this kid; What's even is damn name?"
"No idea, he didn't speak a single word since Garp's picked him up!"
"He reminds me more of a porcelain doll then some 7 year old brat!"
I mentally sighed, wondering if the marines were aware that I could hear them perfectly well. But then again, they didn't know I was currently using cat hearing abilities.
The Cheshire Cat. My favourite animal. They disappear with a mysterious grin/smirk and has hearing that picks up any small secrets or gossips. A smart grin that talks riddles that creates chaos.
A small insane grin was unconsciously growing on my. 'Oops.' I put a hand over my mouth. The small consequence of using Cheshire abilities is that your insanity level heightens slightly and that your feel much more mischievous.
Not that I really mind.
Wearing a large white hood and cape that covered my head, shadowing my eyes. The cloak reached down to my feet, wrapping around me like a jacket.
Personally I quite like it, makes me feel more secure and in control, after all. The more they don't know, the more you're in control. And can lead any situation into more chaos.
Cue unconscious slow maniac grin.
I mentally sighed as I covered my mouth again. I really should control this insane side more.
"ITAI!"
I watched with half amusement and half curiosity and a tiny bit of excitement and maybe...relief.
"Your dear Grandpa comes home and the first thing you do is run away?!"
"Gramps 'Fist of Love' hurts!" a small black haired boy who could be no more than 6 or 7 years old rubbed his large bump on his head.
It's the infamous Future Straw Hat Captain, Monkey D. Luffy.
A large hand pushed me in front of the small 'D', who stared curiously at me.
Suddenly, he gave me a large grin that seems to be too large for his face. "I like you! My name is Monkey D. Luffy!"
My heart warmed unconsciously at his grin. 'So this is how all those enemies of the Luffy suddenly became his friends. I can understand it better now...'
I was only a little bit taller than Luffy, probably about the same size as Sabo and a little smaller than Ace.
Luffy had a small lonely look in his eyes for a second when some kids went by laughing and playing. He took a sneaky glance at them and looked at them longingly.
Of course, Luffy is much more powerful since his birth. So he probably will be considered a freak by normal weak East Blue kids.
Somehow, in him, I saw me. However his spirit is much more strong and radiant then mine.
A spirit I would like to nurture and protect.
I visibly smiled.
Taking a step forward I took off my white hood making Luffy widen his eyes slightly at my eyes and appearance.
Putting a hand on my chest, I smiled gently, unaware of the sparkly sparkles around me that shined on the sea.
"My name is Reiki. Yorushiku onegaishimasu, Luffy." Looking at Garp who looked completely astounded that I spoke a full sentence and actually smiled.
While winking slightly at him I cocked my head and smiled a sweet close-eyed smile at him as I bended slightly to be at the same eye-level at him.
"Your grandfather kindly saved me and adopted me into your family. I know it would be hard, and I don't mind if you're uncomfortable with it, but I would like you to acknowledge me as your new older brother. Ma, for now..."
Holding out a hand for a handshake, "...Can we start out as friends?"
When his eyes shadowed, I lowered my hand a bit with slight hurt in my expression.
.
.
.
.
.
.
.
.
.
.
.
.
.
Before he tackled me to the ground with a lung-crushing hug.
"Does that mean you'll live with me? Play with me? And you won't run away?"
Widening my eyes slightly, I decided to tease him since serious sappy moments were not my thing.
"Hoh~? Do you think you can beat me little anchor? I much stronger then I look!"
"Anchor?! Don't call me that! I can swim!"
"Hm...let's see." Snapping my fingers, a crystal ball appeared out of nowhere. Staring at it with fake concentration, I shook my head innocently at him.
"Sorry little brother, don't see you having the ability to swim in the future."
"YOU CAN SEE IN THE FUTURE?! SO COOL!" Luffy shouted with stars in his eyes.
"That's right, and I can also see that you will be guiding me around this place and playing a game of hide and seek later. I wonder if that is going to happen anytime soon?..." I wondered out loud, purposely trailing off at the end.
Luffy was excited about playing with someone his age and eagerly grabbed my hand and ran off in a certain direction which I'm guessing is the way to his house. "Iku wa yo, Nii-san! (Let's go, big brother)"
"Already with the 'nii-san?!"
Garp smiled at the duo, happy for his grandson, knowing he was lonely and had a feeling that Reiki would make an excellent big brother and a marine.
"WELL, BACK TO THE SEA!" Garp boomed with laughter as he left on the marine ship.
The last thing he heard was Luffy's peculiar laughter that seemed more brighter and cheerful than ever before.
"Shishishishi! This way, Rei-nii!"