"If there's actually a Conspiracy you're their specialist in pointing out misleading flaws that are good enough to fool even me as fun discussion topics, plus there's only so much room," plus if the Conspiracy is being improvised then something was off about Ione's initial confession.  Ione is at the top of his list for being the most likely to be a real innocent in danger / somehow not truly part of the Conspiracy.  Keltham is not going to endanger her if so - a case could be made that he should do it for the good of this world, but Keltham is at least more Evil than that.

"If there's actually a Conspiracy you're their specialist in pointing out misleading flaws that are good enough to fool even me as fun discussion topics, plus there's only so much room in that conversation."  Plus if the Conspiracy is being improvised then something was off about Ione's initial confession.  Ione is at the top of his list for being the most likely to be a real innocent in danger / somehow not truly part of the Conspiracy.  Keltham is not going to endanger her if so - a case could be made that he should do it for the good of this world, but Keltham is at least more Evil than that.

"Among other reasons, if there's actually a Conspiracy you're their specialist in pointing out misleading flaws that are good enough to fool even me as fun discussion topics.  Plus there's only so much room in that conversation."  Plus also, if the Conspiracy is being improvised then something was off about Ione's initial confession.  Ione is at the top of his list for being the most likely to be a real innocent in danger / somehow not truly part of the Conspiracy.  Keltham is not going to endanger her if so - a case could be made that he should do it for the good of this world, but Keltham is at least more Evil than that.