[For a moment, Diarmuid's not sure how to feel about Caster's words. Could it be that he actually is trying to be better as unbelievable as that might seem? And then he realizes what Caster wants Ryoji to do and any possible good will that he might have been feeling toward Caster for at least trying, vanishes.]

Even if it were possible you will not use my son for such a terrible thing! We all have our demons and we faced and defeated them ourselves to become the good people we are now. If you wish to be good, you must face your own demons in the same way. You cannot just give them to another. What would Jeanne...

Wait...your Jeanne is here?

[A memory flashes across Diarmuid's mind. A conversation long ago with one who had been convinced that the other Caster who was briefly in the Tower could be redeemed.]

Ruler. Ruler is your Jeanne...