Teddy and Henry (Scott Foley) got together in the seventh season finale earlier this year.
Raver has now told TV Guide that the pair will be dating when the show returns.
"[Teddy's] finally, for the first time, out of the relationships that she thought were something but turned out to not be anything," she said. "And she's really glad to be out of the love triangle with Owen and Cristina.
"Henry and her are really in love. So it's a good time for her."
Raver also revealed that the working relationship between Teddy and Cristina (Sandra Oh) will continue to develop, saying: "Teddy is trying to impart humility to her because Cristina sees that she's a genius, but she's lacking the really big and basic parts of being a great doctor."
Grey's Anatomy's executive producer Shonda Rhimes has previously confirmed that Foley will be on the show for "a decent amount of time".
The series will return with a two-hour season premiere tonight at 9/8c on ABC.
> Read more coverage of Grey's Anatomy
Watch a trailer for the new season of Grey's Anatomy below: