Sometimes, a character is the perfect alter-ego to write a song about oneself without self-referencing so much. Other times, a character is just a character. Over the years, musicians have come up with lonely dreamers, fearless heroes, mysterious strangers, and even supernatural villains who have become just as famous as the songs themselves. Some were inspired by real people, others sprang entirely from imagination, but all of them left a lasting mark on music history. Which of these 12 do you remember?