I mean, the main marks of the villainess trope are that she's princess-adjacent (duke's daughter, usually), often has dark or scary magic in magical settings, and is harsh and therefore often misunderstood but has a softer side, and she has a big climactic scene where she gets denounced for her (usually false-flagged) misdeeds. As the protagonist, she usually has a love interest who is either notably higher-status OR lower-status than her original fiance who sweeps them off their feet after the big climactic denouncement scene.
So actually the villainess is Sun Liling and the heroine is Cai Renxiang and the big denouncement scene happened back in Forge. Ling Qi's just a minor flunky, sorry.