I like the empress, she's not the character I thought it would be. She's a just ruler from what I have read in the chapter about the werewolf child. She treated her slave better by giving him a room, giving rights to roam around the palace, an attendant, and give permission to read at the royal library. Besides Kang Jun have a better treatment compared to his previous master.
Kang Jun have a chance to turn his life better if he does it right.