Y'all can hate her for being an antagonist all you want, I do too, but you cannot compare her to trashta. At least not at this point in time. Diana is shown to be much more purposeful in her seduction of the emperor rather than a bumbling idiot with no power or backing. She may play coy, but she actually schemes.
Not to mention that technically she came first and that the reason why our FL married the emperor in the first place is because the dude had serious mommy issues (which, fine, but god damn) and didn't make her the empress.
I'm not saying I like her. Not at all. But her position is completely different from Rashta.
Glad to see Lionel all blushy for the empress though.
Lionel household 😤