Fairy tale characters are often used in stories to provide a moral lesson or to entertain. Two of the most popular fairy tale characters are the OGRE and the TROLL. An OGRE is a large, monstrous creature that is usually depicted as being mean and aggressive. A TROLL is a mythical creature that is usually portrayed as being mischievous and sometimes even helpful. Both of these characters are often found in fairy tales and can be used to teach lessons about good and evil.