The Grinch is a memorable figure because he was harsh and grumpy before saving Christmas and becoming joyous and fearless. He also grew over time, changing from a heartless villain to a hero. The Grinch's transformation into a happy person who loves Christmas more than anything else in the world is due to his own conscience which tells him what's right and wrong. When he realizes that giving happiness will make everyone happier, he decides to change himself and become like everyone else. Also see: 'The Grinch' is a dynamic character.