(Zero's POV)
When I opened my eyes I found myself in a strange place it was black as far as the eye could see, the only thing that gave off light was the circular platform below me. The center was gold in color with purple and white lines circleing the outside. The Center of the circle held paintings of two people inside it a boy and a girl both with white hair and silver eyes facing right and left. Six blank circles surrounded them three on each side.
< A/N: A dive to the heart from Kingdom Hearts>
As I raised my head I locked eyes with a man whose hair was auburn and whose lifeless amber eyes stared at me without emotion. He was wearing a black short jacket with red stripes across the shoulders. Underneath it had a red kimono with a black sash, black gloves, grey pants and black sandals.
" You are aware of your actions good. I am Fu and I will be your trainer within your mindscape. I will teach you how to read write and fight, Danzo-sama is putting too much time and resources into you for you to turn out to be defective, So you will learn what I teach no matter how long it takes. If you have any questions ask." As Fu said this there was no emotion in his voice the explanation was delivered with as practically as possible without his face so much as twitching.
I looked at Fu, I sat on the platform as I couldn't walk I opened my mouth to speak but all that came out was babbles. Even so perhaps because we were in my mind Fu understood the question. "What is my name?" In response to the question he said one word in that same dead voice.
"Zero"
(4 years later, General POV)
It had been 4 years since Zero was born though to them it had been so much longer, for them it has been 8 years since they had started training with the people who called themselves ROOT. Wether it be tactical skills, combat training or sealing arts, ROOT taught them all they would need to know to be a proper weapon.
"It is time." A voice resounds in Zero's ears as they look to the source the man known as Danzo the leader of ROOT. He had never joined in the training he only watched and judged. Zero kneels down before Danzo as they had been taught to do. " Your body has reached the optimal level to begin physical training you will be released in a few hours so prepare yourself." As Zero wordlessly nods the understanding Danzo turns around Fu at his side like always they both disappear from Zero's mindscape.
Zero stands looking at the clear blue sky that has recently come into being in their growing mindscape. " I wonder how the outside world will be." Zero states seemingly to no one, however an answer is received. " Don't do anything foolish Zero." A soft voice full of authority speaks to the 4 year old child as they turn and look over their shoulder at the hazy white and black figures. "I won't." They plainly respond. A small smirk on their face.
(ROOT Lab)
The capsule holding the child slowly opens the liquid inside draining out as well as the child drops on her hands and knees greedily gulping down air for the first time as she takes a look at her body.
A slender feminine frame with two small mounds on her chest, her long orange orange hair containing streaks of black hangs down to the middle of her back. She stands she looks at her hand frowning as wills her body to change. Her body fills out her once slender arms become larger and more solid her cute face now gaining more masculine features as her soft eyes become harder. A "third leg" forms where their was previously nothing. Zero smiles changing their body between male and female a few times before settling on a non-binary their body having neither a snake nor cavern as their body becomes neither thin nor thick.
< A/N: Sorry I am not good at defining body shapes basically Zero can change between Male, Female, and Non-binary whenever they want I will use the correct pronouns depending on their Gender. For now the pronouns will be They, Them. >
Zero then looks up at the three who were standing in front of them before taking a knee and bowing to Danzo. The old man looks at the kneeling child as he smiles and speakes.
"Welcome to the world Zero."
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I hope I didn't offend anyone with this chapter. I had recently been thinking what it would be like to change genders whenever you want and decided to make this story. I haven't seen any fanfiction with a transgender protagonist so I thought I would try and make one, I got the idea from the character of Alex from Magnus chase and them using their shape shifter abilities as a child of Loki to change their Gender. As for why Zero can do this well you will find out in the later chapters but I will give you a hint this isn't a transformation jutsu.
Finally before anyone misunderstands Zero doesn't dislike being female the reason they frowned was because they didn't like idea of being trapped in one gender forever.
Anyway I hope you liked this chapter there will be some more Kingdom Hearts elements later along with some elements from other media. If you have any suggestions on how the story should go tell me, I have a rough Idea but I am mostly making this up as I go.