The Crash Heads - Harlan, Moe and Chaps - are minor non-playable characters from Grandia Xtreme. They are a band of musicians from Escarre who relocate from their music hall there to Locca in order to find inspiration for new songs. By collecting Sound Bites throughout the game and playing the clips to them, they are able to get their inspiration back and write various classic Grandia songs. If they complete a song, a concert can be held, in which a rhythm game is played.
Grandia Wiki