"How would you define it?" A better question and the answer might tell him much. He'd thought long and hard on this question for himself before, but he did not yet know what the man before him believed.
"What is he paying you?" Not that he'd hire him; Batman had no need of a bodyguard. But he wanted to know how things worked among the others here. Not to mention what would make someone work for someone as delusional as this Yagami and his erstwhile follower seemed to be.