Monsters, Heroes and Demons

This is a story of courage, skills and pure luck. There is no Earth, no Milky Way. Normal physics don't always work. This is a galaxy filled with planets inhabited by Monsters, Heroes and Demons. Monsters aren't always bad, Heroes don't always succeed and Demons don't always play for the evil side. Help me with this story by sending in characters to me. What will you do in this galaxy? Who will you be? Can you change a planet, life, or the whole galaxy as they know it?