The hero is the main playable character. With a lack of story in the game and multiple armor, it is hard to tell if the hero is a boy or a girl. They might be a boy because of the leaf armor which is only a single leaf to cover their butt and the fact that the original name is Hero, not Heroine. But Heroine is a more specific term while Hero isn't so that argument is hard to make. But they might be a girl due to the Fabulous and Pigtails armor. Or they might be genderless.