He hadn't even really noticed she'd been in his personal space for long. Another thing that had changed that he hadn't realized until now. Usually he would've noticed and even moved away. With Setsuna, he hadn't. He'd even go as far to say that it seemed natural.
"You always do have a way of seeing things I've never could," he told her. It annoyed him but he also admired her for it. "Perhaps you are right - I have changed a little. All because of you."