Long before time had a name there was the realm of the Oni and the Dragon, the Dragon had the power to create, the Oni had the power to destroy their war was never ending.
But a child arrived born of both worlds, the child understood the power of both without one you could not have the other.
But when the Oni and the Dragon fought for which side the child would be on, the child abandoned their world to start a new one, NINJAGO.
But awhile after the child left another appeared, but unlike the first this one took the form of both their bloodlines, a young Dragon with the features of an Oni with power possibly more powerful than the first child due to being closer and more attuned to their power and blood.
Just like before the Dragon and the Oni fought for the child, but unlike the first choose to stay in the first realm and observe, observing as the Dragon and Oni fought with curiosity wondering why they fought.
The child with childlike mischievousness decided that too mess with the two sides, messing with their battles, copying the way they fought watching and learning as they used their powers and even finding out more of their own power.
The Oni annoyed by the young hybrids actions began to attack on site, while the dragons though annoyed by its actions understood that it was still a young hatchling.
As it grew older the hybrid tried to unite the two sides though they failed many times.
While interacting with the dragon known as Firstbourne it told of another, an older sibling, intrigued by this notion they asked where they were and was told that they left their realm to create another.
While training their powers they found the ability to travel between realms and soon after they too left their home.
While traveling the realms the happened upon a the realm of Ninjago not that they knew at the time, they sensed a strange energy similar to their own yet different.
After exploring a bit they came across a battle, the battle between the First Spinjutsu Master (FSM) and the Overlord.
Intrigued they watched as the FSM fought against the Overlord and his stone warriors, watched as the FSM used a strange but powerful technique that they later learned was SPINJUTSU.
The hybrid witnessed the FSM split Ninjago in two, later in their temporary home a cave more than big enough for them the hybrid tried multiple times to copy spinjutsu, time and time again they failed until one day they began to form a small spinjutsu tornado.
( similar to arins from DR)
As the days passed the hybrid mastered the technique and when exploring the realm they found anthropomorphic reptiles some with legs while others had long tails, the hybrid later found out that they were called the SERPENTINE.
Deciding to approach them the hybrid uses the elemental power of form to fit in more easily.
(The one on the right only more feminine so no top nose horn also no armor and around the size of the left one for now)
As the hybrid inspects their new form, one the serpentine an Anacondrai noticed a sound coming from the bushes and found the young hybrid the serpent tried to ask who they were and why they were alone in the forest, the hybrid not wanting to give away their disguise also not knowing their language decided to act confused.
Seeing as the young serpent looked confused the Anacondrai decided to take in the young serpentine.
After learning the language the older serpent asked if the younger one had a name the response was no, the older serpent decided to name her Akira.
After receiving a name Akira spent some time learning the history of the serpentine and learned of the tale of the Golden Master as well of the Great Devourer.
As time passed and Akira grew older she travelled through a pyroviper village/city and heard that the children of the Fsm were captured and later escaped.
Deciding to look for them she found one of the children, the younger sibling Wu who was training a young pyroviper in spinjutsu.
The pyroviper named Aspheera later went back to her village, Akira followed while using the elemental power of light to stay unseen.
She watched as Aspheera challenged the king pyroviper and won, she watched as the children of the Fsm fought her with a more powerful spinjutsu.
She then followed Wu and Garmadon to the monastery wheretheir father scolded them for teaching a serpentine spinjutsu and using the scrolls of forbidden spinjutsu.
Sneaking around the monastery Akira came across the Golden weapons of spinjutsu, feeling their power Akira used her own to find out how they were made.
Hearing someone coming to the door she used her the elements of shadow and smoke to sneak out of the monastery and continued to hide amongst the serpentine all the way till the serpentine wars.