The fist time Shanks and the others found out that Luffy was strange was when Luffy used Haki for the fist time it was like this...
flashback...
"yosh Let's get Luffy some milk hey Benny get me please the milk" Shanks shouted to his annoyed friend who took Luffy and slamed a bottle in Shanks face.
"you like this don't you. if you want we can do that a lot more later." And Shanks paled at what his sadistic firstmate suggested and shouted out fear "Luffy I give you mashed meat instead of Milk if you want" it wasn't even a second gone by before Luffy quickly turned around to his father figure and cried out in joy "Yeshhhhh" and Shanks sighed in relief.
after breakfest Shanks had to do paperwork and left Luffy with Yasopp, because if he left the little one with Ben he would definitly brainwash her with sadistic things like tie shanks on the mast and drink rum in front of him or trow balls at him. after a while of playing Yasopp fell asleep and Luffy played with her toy's until she got bored and wanted the meat that her nose picked up and wanted to leave but couldn't get it cause the door was closed. Luffy's eyes were about to tear up and cry but her stubborness was stronger and she punched the door open with a hard black fist. the door was completly shatered and Shanks Jaw dropped when he saw a whining Lucky roo and a broken door where nearby Yasopp was lying on the floor with some bumbs on his head.
"Great first try and for Ben paper work" he said without kowing that the said man was standing behind him.
Four years later
The little four Old was now getting ready for the first time in her life to leave the ship even if Shanks doesn't know because Shanks said 'Adventure first scolding later' so she and her friend Diana, a sea king with navy blue scales, took her luggage and went on a unhabitted. island on the island were many unknown plants and dangerous beast like the moon silver wolf.
"I wonder where i should camp maybe in a cave?" Luffy was wandering in the Jungle for hours on the search of a cave when suddenly a...
"Grrrrrgrrrrr grrrgrrgrrgrrrr"
"wahh what a cute doggy want to be my pet?" she said and started patting the beast. the Moon silver wolf liked it and became from a wild beast to a big doggy. Yes only Luffy could do that.
Luffy spent ten days on the island exploring and is today exploring the last part of the Island then it's officiel the Island was hers.
Luffy was wandering in the forest whrn she suddenly smelled meat on grill. she ran as fast a sheather and was standing in front a girl two years older then her. she had pink long hair and golden piercing under her right eye. She wore a green Hat, white top and blue shorts.
"WHO ARE YOU AND STAY AWAY FROM MY FOOD" The girl shouted when she saw Luffy eyeing the Meat.
from this sentance alone she knew that the both of them are going best friend
"I'm Monkey D. Luffylia call me Luffy or Lu since we are going to be the best friend ever, y'know i claimed this Island some days ago do you want to live with me and and... Oh! What's your name" the pink haired girl looked at luffy if she was crazy. even tought she is.
"O..k... my name is Jewelery Bonney call me... Bony" she stutterd when Luffy gave her the brightest smile she ever saw "y'know Bony your so pretty!" yosh Bonney was now blushing luffy is smothtalker that's what we today found out. they talked a lot together until it was dark. they were on the way to Lucifers cave. _she named the Wolf Lucifer_. That was when Luffy found a weird looking fruit and ate it Bonney paled cause her now best friend just ate a devil fruit and had Animal ears and then ten fox tails Oh oh. Luffy was now a Kitsune.
after another four days Luffy sat the Strawhat on her head. and finished to pack her luggage. Unknown to Bonney, Luffy sat her on the Sea kings head and were on the way home.
"WHEREE ARE WE LUFFY" after Bony woke up she shouted on Luffy being already used to her craziness.
"We are one the way to Red force my home i didn't wanted to wake you up and we must go at night cause if we go at day Shanks is going to get mad" luffy explained.
"Eh why?." ~Bonney
"Cause i kinda two week's ago snuck out hehehe~" ~Luffy
"Ok nothing New" ~Bonney
They were Lucky that the one on Crows duty was sleeping and snuck with stealth in Luffy's room and fell asleep.
The next Morning
Shanks was going in Luffy's room then he missed her two weeks ago she sudden disappeared with his Straw hat 'stupid brat' he tought when he opened the door he wasn't prepared at all for what he saw.
Luffy and a girl with Pink hair was sleeping on the bed with a big two foot tall wolf.
"LUFFFYYYYY" and in seconds the whole Crew were celebrating the arivial of the little four years old and her friernd. but of course after she got scolded.