THE INTERNET MUST KNOW

"Indeed, one of the strengths of this season compared to last has been
the show turning Kristina into something more than the impatient bitch
she often seemed to be last season."

"[Antonia] is a witch from the era of the Inquisition," Turbay revealed. "Her spirit is haunting the vampires, and she's around and she's causing a lot of trouble."

Haven't read the books. Don't plan to.

Mixed reviews about the reviewer using copy pasta. For shame, Hyden; and well said, Casebuto.