There is more than one artist under this name: 1. Dummy is a Japanese male vocalist and member of the bands ProjectJAM (a cover band of JAM Project), GLAND ZERO and GOD SILENCE. He's best known on the doujin music scene for his many guest appearances in rock songs from the doujin music circle Iosys. 2. Dummy has been a punk rock staple in the Chicago music scene for years. They combine thundering bass lines, mammoth guitars and vocals that are aggressive yet melodic. Best described as post-punk, the label is a bit misleading.