The man talks too much. Kill him quickly and get this over with, you have better things to do than play with fools.
She always seemed to chime in when he least wanted and he tutted outwardly as Jurden moved in for a lunge, which in turn turned out to be a feint that developed into a cut to the clones right. Kojiro's hands adjusted their grip and brought the blade of the pike down, knocking it wide. As he did so moved his body backwards and to the left, once more his hands easily slid down the weapon and he pushed feeling the length of the weapon pass through his hands in a thrust that would have skewered the other man through the throat, however Jurden had managed to retract his saber, holding it tight across his body in time to block the blow. As the pike thrust was redirected Koji used the momentum to spin on his heel, momentarily turning his back to the Shar Darkhan Aedile and drove the rear of the weapon backwards. This movement caught Krennel off guard, clipping him across the side of the head, opening a slight tear in the man's skin.
Blood began to pool but before the Keibatsu had time to recover from his risky strike he felt a surge of nothing strike him in the back and send him soaring forward. His right arm crashed into one of the ship's metal supports, a crash of metal on metal echoed down the corridor as the clone tumbled and turned. Finally, he met a bulkhead which stopped his momentum and he shook his head dazed.
That was hilarious, do it again.
“Some Goddess you are, where’s my support?”
Nothing, then again she rarely responded once he called her out. Still dazed he pushed himself to his feet and reached out with the Force calling his pike back to him. As it rested back in his hands after its short hop from the ground Koji looked back up the corridor. Jurden had begun to move towards him and was gaining a bit more ground that the clone would have liked given his current predicament in seeing more stars than had any right to be inside a ship. The distance between them was closing fast and he estimated he had about two hundred meters before they were engaged once more. A snap-hiss echoed nearby and it took him a couple of seconds to realise he had ignited his own weapon once more. Light washed over him and without thinking it through he took two steps forward, hefting the pike as he did so, drew back his arm and hurled it like a primitive javelin straight down the corridor towards his opponent.
So caught up in closing the gap between the clone and himself Jurden failed to notice the saber pike soaring towards him. Something in the Force tweaked and he raised his saber up in time to deflect the red missile away from his face and he heard the almost inaudible woosh of the weapon as it passed by his ear. Sweat began to appear on his brow as he began to take in just exactly how lucky he was to still be alive. The pike clattered with a wall somewhere behind him and disengaged.
“You nearly kriffing killed me!” The man yelled down the corridor to his opponent. “This is meant to be a friendly tournament you freak! Clan brother against clan brother!” The anger had begun to rise at the audacity of the man before him.
Kojiro moved towards him. His heavy footsteps clattering upon the metal beneath his feet. “Brother? You are no brother of mine. I am Nihilegenia, I am Keibatsu and I am Naga Sadow. You? You’re a traitor. Betrayed your own clan for the glory of a position,” the words rang with venom as they left the cyborgs mouth. They dripped with poison that quickly seeped into the other man's mind. “A clan, I might add, that murdered members of my armed forces. You are no Sadow. You are weak, and the weak must be purged.” A soft movement followed these final words and a snap-hiss filled the corridor. The Keibatsu stood illuminated in silver light as a second saber came to life in his hands. “This is the weapon of my predecessor, a woman of two masters. Perhaps I’ll add yours to my collection next.”
Ooh, that has to hurt. You are really not planning on making any friends today are you?
As her words seeped into his mind the clone let out a roar and charged once more into the fray.
Syntax
Watch your tenses. This should be in the past.
Close, but this isn't how a semicolon work. They split two independent clauses. Your ", however" joins the clauses together, rendering it moot in this scenario.
Should break up the flow with a comma here. If you led with this section, you'd throw a comma after it. Same reasoning here.
In "he said/she said", the dialogue and the rest form a single sentence. You'd use a comma here, never a period.
A lightsaber isn't a proper noun so it has no need of a capital.
There should be a comma breaking this up so it reads with proper flow.
Story
The pacing here is very clipped and so is your sentence structure. Look into varying up the sentence length and don't be afraid of sentence fragments. While frowned upon in structured writing, they can be quite impactful in narrative form. Your dialogue also falls somewhat flat. However, you have good ideas and the base is clearly here. Just a matter of practice and critique.
Realism
This doesn't really jive with two of your aspects: Didn't Say Anything About That and Heavy Handed. The latter especially, in the sense that this is far too agreeable. Your sheet shows a character that pushes his weight around and assures his advantage. This is far too agreeable and submissive.
Your opponent has two Combat Aspects that explicitly state he loves combat and will even throw himself into harm's way. Why would he merely stand there once combat was inevitable? This is a very minor hit, but one nonetheless.