Commander Karbin, one of your contemporaries that threatened to replace you to become Sidious's new right hand man. One of Cylo's twisted up experiments, trained or oversaw by Sidious, something he never told you about. The fact that this Mon Calamari has the audacity to even be held up to your level by Sidious is heresy.
You crash landed here on Vrogus Vas, then proceed to utterly destroy a whole battalions worth of rebels single handily, and in the process catching up to Leia Organa.
You stood in front of her, your intention was to capture her. Things however didn't turn out how you envisioned it to be. With Karbin interjecting in this process, wishing to claim his prize. You turned to see him and a few of his stormtroopers trudging through the sandy smog of winds into view.
"But it's not the rebel princess who will be put out of her misery here today. It's you, you withered old relic." A blatant threat to you, a Dark Lord of the Sith. A lesser being threatening you, pathetic.
Walking up to you and staring straight back at you with his big fish eyes, challenging you and attempting to intimidate you... in his dreams.
"Ah, it's all making sense now, isn't it? How your rival set you up and used you to eliminate the rebels on Vrogas Vas." Continuing to threatened and even mock you, it struck a nerve... hard. Karbin as sealed his own fate.
You sent a powerful force push into the stormtroopers around him, knocking them all out. "You will win no prizes here today, Karbin. Except a quick death." Igniting your crimson red blade in your hand.
Karbin merely scoffed in amusement, igniting his own four lightsabers, from a mix of green, blue and purple colourations.
"I'm glad you didn't die without knowing it was Karbin who engineered your doom. And who shall rise ascendant from your ashes." Confident in his own abilities since one saber against four, to him, you are the one that's outmatched.
Meanwhile Leia would use this window of opportunity to escape... Heading for Luke and the others...