An idea for a superhero: she can deftly and permanently reform any particular low-level stupidity using in-person persuasion, but can't impart a truly general l

An idea for a superhero: she can deftly and permanently reform any particular low-level stupidity using in-person persuasion, but can't impart a truly general lesson (so the villains can offer many episodes of mayhem). Our hero can't fully impart her persuasive ability to her sidekick, even though to all appearances it's her insightful arguments that do the trick, not any magical charismatic force.