I think this is a great story well done. My one question is what makes Trey different? I didn't quite grasp that

Prologue Review (I just dumped everything I noticed for the prologue in this, so enjoy)
First thing I noticed: make your prologue and Chapter 1 longer, and publish them as separate chapters. Second thing I noticed: In your summary, "...a frightening secret. One that could..." use a dash or comma instead of the period. It would eliminate the fragment sentence and introduce more sentence variety.
The first sentence is a little awkward, and the second sentence has exactly the same structure as the first. I'd phrase the first paragraph more like: "Master Thain Dural stood in the dusty Geonosian arena and gazed at the burning orange sun hanging above the audience stands, coughing in the hot, dry, searing, stinging air. He did not want to look at the dead around him." Oh, also, “It’s sickly essence” has a punctuation error-’it’s’ is ‘it is’, while ‘its’ is possessive.
“...he had seen it all himself… from the very center of the carnage.” First: I don’t think you should use an ellipsis here. A comma would be better. Second: Wait, what? More info, please!
“...until his mind would except it...” The word I think you’re looking for isn’t ‘except,’ it’s ‘accept.’ To ‘except’ something would be to single it out.
You use a lot of ellipsis in here where commas would be better, or nothing at all.
“...her once lovely, vibrant face now cold, and covered with blaster burns.” This sequence is a little confusing, and if there’s one thing you don’t want your writing style to be, it’s confusing. Try something like this: “her once lovely and vibrant face, now cold and covered with blaster burns.” All you need to do is change a few punctuation marks and conjunctions.
“Her once violet, vibrant eyes of his apprentice…” Again, this is a little confusing. Change ‘her’ to ‘the,’ and it’s cleared up. If you use ‘her,’ you’re using two different possessive statements for the same thing.
“...his padawan’s accusing eyes. At least, they seemed accusing to him.” I don’t think the second sentence is necessary, and given that you described her eyes as ‘vacant’ before, you could/should take that into account, as ‘vacant’ and ‘accusing’ as descriptions of eyes are usually mutually exclusive. Try ‘his padawan’s eyes, which accused him with their emptiness” or something like that.
“...emotion almost overcame him.” What emotion? What were the symptoms? More description, please!
Combine the last two lines of the prologue into “her now lifeless body-”I will never train another.”

Good writing although I'm not sure how I feel about the plot progression. Maybe it's a tad slower than I expected.

Welcome back! It’s been a minute since you last updated but I’m glad you did. I’d forgotten how much I enjoyed this story and I’m glad you’re bringing it back. I’ll definitely be keeping an eye out for any future updates.

Kriff! Ok, your knowledge of the Star Wars universe is extensive, you know little details that most well-read people don't know. Your writing flows and you have a wide vocabulary, It's beautiful. If you're not an author already, do this multiverse a favor and become one soon

lol this was a very entertaining chap. The banter was fun to read. Looking forward to getting back into this story. I took a long hiatus and never remembered i had turned off notifications for this fic. My mistake bc it seems I missed a few updates! In any case tho... I hope you find the time to complete it. In the meantime, I look forward to catching up. Cheers, mate!

Another great chapter man. I'll be in the lookout for the next one!

Oooh, I'm really liking Trey and his character so far. The opening to this story was really gripping and quite brilliantly written as well. It really sets up a conflict that I'm interested in learning more about. The internal monologue rambled a little, but other than that great read!

I sorta knew something like this was going to happen. but I did not expect lusty twi' leks! I mean of course I am glad she didn't get hurt and you know, but the end... bad twi'lek! I all honesty though it was great writing. You captured his innocence well and his... inexperience ad awkwardness well also. I really liked the inner battle with himself regarding duty and how he could 'hear' his brother's accusations. That was good. keep up the good work

Hahaha! This was absolutely brilliant! Great job! At first it started out somewhat foreboding then... nope! It was really good absolutely! You had some great one liners in there as well like the "I am your brother" bit. The "Who let the Jawas out." Quay smiling down at Oni waving his palms in the air when he gives him the hypo. Great job... I could go on and on. And it was good humour nothing cheap and ridiculous. Great job! :D

HAHAHA. That was very entertaining :D

This was deep. Real deep. Good on, mate. The emotions were so there and that image you put in my head of Duece crying on his bed... Well done.

This was a very interesting chap. A good look into Oni's head. I am really liking the depth your giving these guys. Good job.

This was really good this chap. Great job on the story telling. I found a few typos and the ever present ellipses :p but the story line is really getting interesting now. One suggest:

Whenever you change speakers in a line of dialogue, try putting it (the dialogue bit) in its own paragraph. That would make it easier for the reader to follow the transition of speakers. :)

An extremely long chapter but it was good. I liked the end when Trey's inner voice was starting up. VERY interesting... Commander Ax certainly is full of himself and his 'dreams' and this:

'Trey-cicle' lol Good 'un mate!