Still good stuff, Thalass.
Found some errors though.
She ought to be used to it, she thought. Even if Kase only required she wear it on official occasions, she'd been a slave longer than most survive their cruel masters.
This just looks a bit odd. Think you just have the start of sentence in the wrong place.
She ought to be used to it, she thought, even if Kase only required she wear it on official occasions. She'd been a slave longer than most survive their cruel masters.
This looks better to me, but the choice is yours.
First line of second paragraph - Grubers should be Gruber's.
What Gruber called his 'office', really just an old isolated storeroom that was far enough away from the 'palace' that Gruber felt safe conducting business there.
Another one that doesn't look quite right.
The comma after 'office' suggests you are interrupting the sentence with extra information, but you don't restart the first bit (so I changed it to 'was').
Ends up like this.
What Gruber called his 'office'
was really just an old isolated storeroom that was far enough away from the 'palace' that Gruber felt safe conducting business there.
Spelling - Anonymous and companion.
And finally a small one. Don't put fullstops (or periods, if you prefer) at the end of speech unless it's the end of the whole sentence.
"You've been reading way too much, Graf." he said.
Should be . . . way too much, Graf," he said.
Still a good read though. Good to see some more after your 'understandable' break.

Smiley

If you can keep your head while all around are losing theirs . . . you'll be taller than them.