Costigan gave the guy a small smile. He understood the refusal for what it was and appreciated it. Bakura didn't need looking after and Costigan didn't need to look after him, but the gesture was made and accepted. That was all they needed between them, a look and a nod, to capture complex meanings. The Bostonian wondered if he should be worried that he had found that with Bakura of all people, after having similar understandings with Kyle Rayner and Bruce Banner.

"See you around." He offered simply, turning to exit. There was time to stop him if needed, but otherwise he would depart without further comment.