Terezi isn't about to get off the defensive, but she growls less when Eren starts backing up. She doesn't trust this strange kid at all, but she's not about to attack him when there are more important things to do.

"And you're the one with the knife," she retorts. She's already reaching to get one arm under Karkat's good shoulder and around his back. It's a no-brainer that she needs to get her friend out of here fast, before one of the more bloodthirsty tributes sees him laying here like a sitting duck.