I can't lie, I actually like the empress as a character. In no way do I support her actions or the way she treats Etienne, but I enjoy her writing.
She a cruel, calculated, and cold mother. She'd do anything to get Etienne on the throne. No matter who she has to sacrifice. She's a genuine and well thought out villain. Don't jump me, I'm just expressing how I like her character, not that I necessarily like her specifically.