Speaking to Entertainment Weekly, the 40-year-old actress, who recently started filming in the role of Teddy, said that her character may disrupt Christina and Owen's relationship.
"She was in Iraq with Owen," Raver said. "She's a cardiac surgeon. She's really good at what she does. There'll be some interesting stuff between Teddy, Cristina and Owen."
Asked if Owen and Teddy have a history, she replied: "When we first meet her, we're not quite sure. But there's definitely a hint of a triangle."
Raver also revealed that she is unsure how long Teddy will be hanging around for.
"It's sort of a similar situation to when I joined 24. You just don't know. I'm recurring, but I don't know the [exact] length. It's interesting because Teddy is in the same situation," she said.
"It creates an exciting dynamic because it forces me to be very present and enjoy playing this really great character."