I don't hate Rashta but I really don't like her (and not because I love Navier). Honestly, I find it pretty amusing that people are commenting how they dislike her for causing suffering here and there and how she should be more considerate or "good". Guess what, she was a damn slave...so I fully support her screwing over alot of people because no one actually ever gave a damn about her as a slave. And, I honestly would like her if she was actually intentionally scheming instead of being used left and right with no real agency of her own.
However, some of her characterization just comes off as stupid for someone that was a slave (especially one that had enough spine to actually run away). I feel like the author gave her that background to make her a sympathetic villainess, but ultimately fails hard. She comes off infantile
(god, I hate how she speaks in 3rd person) and sheltered in a way that makes me question how she could have ever decided to run away. God, even the way she behaves with Navier doesn't come off as former slave but a sheltered/naive commoner/servant who has no understanding of heirarchy (and as a former slave, she should be aware enough of social heirarchy even if she doesn't know all the rules and etiquette that it entails...probably conditioned to tread lightly else suffer the consequences).
Hell, her "relationship" with her previous master and having his kid should be horrifying as hell because guess what....she was a slave and thus couldn't have truly and fully consented. But the story kinda glosses it over and doesn't really make the reader see it for the horrifying situation that it is (the narrative shows that her master apparently did "care" even if he was a coward....he isn't old or ugly. Imagine if her master looked like jabba the hutt and didn't give a damn about her but had no problem forcing himself on her).
Honestly, I would even accept her personality if she showed that it was just a mask for a very cunning and ruthless former slave who realizes how precarious her situation is and knows she needs to act a specifc way to garner sympathy. But no, she is essentially a plot device used to show how shitty the emperor is (and god he is...I genuinely detest that asshole).
I genuinely feel Rashta would have made a great character but she is just so...ugh. It also would have been hilarious if she schemed enough to screw over the emperor intentionally. Hah a story where both the ex-wife and former concubine drag the emperor over coals.