The first thought that passed through Jason's mind was whether the agent finally gave up on spying on him. But that didn't make sense. Jason hadn't done anything different from what he had been doing since she started watching him, so why did she leave?
The only other explanation would be that someone else told her to back off and stay away from him, and Jason began to wonder what could possibly be happening in the world outside his knowledge. Jason knew he couldn't decipher anything about who was behind the agent unless they revealed themselves, so he decided not to let it bother him as he told Fenrir to keep an eye out for a bit longer in case anything changed. If the agent gave up, then it was better for him.
