This is how it works: You name a minimum of 2 songs (and the artist if you know it) for each character you wish to have described by the songs.
For example, here's mine:
Axel: 'MOVE' - Thousand Foot Krutch, 'Metal Health (Bang Your Head)' - Quiet Riot
Ziggy: 'Poker Face' - Lady Gaga, 'Don't Trust Me' - 3oh3
Zero: 'Zero to Hero' - from Hercules, 'sexyback' Justin Timberlake