The correct answer to this open question is the following.
The character from the fairy tale I am going to pick is Kimmy the Cricket from Pinocchio. The new, intriguing problem I am to set up, is the following.
Jimmy the Cricket was portrayed as the "good, amicable consciousness" that whispered good pieces of advice to Pinocchios during the film. But what about if Jimmy would have been the opposite, a stern, strict, military-style of "consciousness," that instead of sweet and amicable pieces of advice, would have forced Pinocchio to act like a man. Yes, like a military sergeant that had pushed Pinocchio out of his comfort zone and forced him to have the character he needed to make good decisions. No Jimmy the Cricket lovely face, but the sergeant grim in his face.
Would Pinocchio have left Gepettos' house? Would he had been tempted to take the wrong turn and end up in the circus?
The story surely had been completely different.