At the question, his expression closes a bit—though not much, compared to how it might have once. For a moment, he thinks about how to respond.

"I told you about the thing I do," he says at last. "Where I make people do what they think they should? You'd think I'd eventually find someone who it wouldn't work on, because they were already doing everything they thought was the right thing. Like, I wouldn't want to meet that guy on the street, but you'd think he was out there giving people nightmares. But I've never found a Shadow like that. Not once. Everyone has something they think they should do, that they're not doing. And they always have some kind of reason for it."

Ren didn't, in fact, go into nearly this much detail the only other time he mentioned True Calling to Akechi.