Faith.
Faith in her abilities. Trust in her intent. Confidence in her loyalty, her strength, her selflessness. She could sense what Aiden was feeling, touching at the edges of his mind. She knew that he was genuine.
Just as genuine as the bloodlust, stark and overpowering, flooding into the arena from around them. The savage anger of the Roggwart, hungry and in excruciating pain, striving to slaughter them both. And, their fear. The beast’s fear. Aiden’s fear. Her own fear.
Light and dark.
Sera gave her Proconsul a bright, shining grin, through bloodstained teeth and the pain of her half-healed rib. The Zabrak reached out, placed a hand on the human’s shoulder, and melded to him. It happened in a flash, their internal rhythms synchronizing to each other, to the beating of their hearts.
“We’ve got this. Be done in a hot second, yeah?”
She was moving before Aiden could even react to the pun, plumes of sand kicking up behind her as she charged directly at the roggwart, burning saber in her hand. Sera could see the plumes of flame poured from the arena floor behind it, approaching with a steady beat. She dropped into as she crossed the next line of jets, just before the wall of flames first to life, coming to rest unsigned. The roggwart’s gaze was locked on her as she looked up, coils of smoke curling around its black, leathery hide.
It regarded her with a dark, bloodthirsty gaze, its fang-filled maw falling open, barrel-like chest expanding outward as it took in air. Already, she was moving...but Sera made no move to dodge.
Light and dark. Fire and ash.
Balance.
Her bond with Aiden wasn’t telepathic or precognitive. Rather, it was...sympathetic, coordinating them, holding them together, augmenting their awareness of the other. She could feel him in the Force. A steady, plodding tune, balanced and even, matching to her rising song in a beautiful harmony.
He was there for her.
The roggwart’s jaws opened, preparing to unleash a stream of flame that would burn her to ash and cinder. Then, they snapped shut with violent, crushing force as a telekinetic grip closed over them. A smile spread across Aiden’s face as he clutched tighter, limping closer with his saber held in his free hand.
Sera held her charge, sprinting directly at the beast. Unburned, it lashed out with its one good claw, but she dropped into a fluid slide, one that she had practiced almost all her life with K’thri...and though she wasn’t quite large enough to sweep this creature’s leg, as she normally would have done, there were other options available.
In the last moment of her slide, Sera caught herself and whirled, bringing her saber around and smashing it against the flesh and the back of the roggwart’s knee. When the flesh resisted, she pushed with all she had, calling the Force to amplify her strength...until she felt a familiar give. Hide and muscle buckled, and the tendon of the hamstring parted, then snapped with a sickening wet thwck. The roggwart screamed in sudden agony, its leg buckling beneath it. Sera scrambled away from the scrabbling beast, barely avoiding the tail as it lashed over her head.
The limb buckled, and the roggwart fell heavily to the hard packed sand. Crippled, it had no way to fight and nowhere to go, scrabbling desperately away from the source of its agony. Sera, for her own part, was trying to blink black dots from her eyes as she sat up. Between the healing, the meld, and the last spot of amplification, it was a miracle that she was even conscious.
She looked up as Aiden offered her a hand up...and a smile.
“Impressive, Kaern. Guess you could say...we’re really on fire.”
Sera could only respond with a grin. He pulled her to her feet with a low groan, and they supported each other as they turned back to the roggwart, which had dragged itself several meters away. The audience was shrieking, frantic and overjoyed at the spilling of blood. As one, thousands of voices joined a single, torrid call.
”KILL! KILL! KILL! KILL!”
Sera’s grin died as she heard it. Aiden just shook his head.
“Not our job to see them entertained,” the Human muttered, guiding them towards the fallen roggwart. “We came to see a job through...not to satisfy their bloodlust.”
“...’Through serenity, I gain strength,’” Sera quoted, recalling the code of the grey jedi. She wasn’t a great scholar, but a few things still stuck. Aiden nodded in response, circling around the beast. It looked up at them with wide, dark eyes...but it was helpless, now. Its fate in their hands.
“And through victory, I gain harmony,” Aiden completed, blue-green eyes meeting Sera’s. “Today...we found both. Together.”
She nodded, her grin slowly returning. Then, she raised one foot high, muscles tense, and brought her heel down on the side of the roggwart’s skull, knocking it out cold.
“Now...let’s take this beasty in. Before Head-Lady sends anything else after us…”
Positive Takeaways
You've done a nice job of setting up a bloodthirsty crowd and the generally threatening atmosphere as a backdrop for this test. Sera and Aiden have an exchange, the roggwart is introduced, Sera charges right in per The Sera Way ™, it gets spectacularly fiery very quickly...all good tense fun and some nice combat from our favorite Zabrak.
Can Be Improved
That said, we get no combat from Aiden in this post against the creature, which is nearly tantamount to no combat at all, given our scenario sort of event setting of both combatants vs the creatures they face. This brought your Story score down without anything substantial to bring it back up. I had a couple of questioning moments with Sera's seeming grumpiness vs her eternally cheery Aspects, and was a little unsure if either of them really knew anything about roggwarts or not, with some mixed signals.
The other major thing was your Syntax: missing possessives instead of plurals, lack of commas, capitalization of roggwart, which is not a proper noun. There's also the dialogue punctuation.
When punctuating dialogue, the simplest explanation I can give is that you must treat dialogue as either part of the sentence or removable from it. That is, whatever action is connected to the dialogue is either standalone, in which case you can use a period inside your quotes and capitalize outside it, or it's connected, and the text would be a fragment if it didn't have the dialogue.
So it looks like this, if we pretend that Sera said nothing: "Sera responded as she grabbed her dagger and ran forward towards the creature." Responded what? We've got a verb, and we've got a subject in "Sera," but we don't have the object. We don't have whatever it is that's been shouted. We're clueless. The sentence doesn't make sense on its own because it is missing half of it.
And then, later on:
Contrastingly, these excerpts all face the issue of being connected because of the comma inside of the dialogue, but the action/verb has nothing to do with them actually speaking. Aiden rolling his shoulders is its own action. It does not apply to his dialogue. This is another common error, where writers use actions/intents/etc as the verbiage next to their dialogue to explain and show more, but those verbs don't make sense with the dialogue itself. They make sense as a thing the subject is doing, they just have to be separate. Thus, it works with the dialogue ending at a period, fully closed, and the next sentence on its own:
Some examples of several other ways dialogue can be punctuated correctly, just so you can see the differences: