Erik Gustaf David Norén, was one of the two frontmen (vocals, guitar) of Swedish rock band Mando Diao. In 1996, Gustaf met Björn Dixgård at a party. A short time later Björn invited Gustaf to join his band; they became the two frontmen of Butler, the band Björn Dixgård had founded together with Daniel Haglund, the later keyboarder of Mando Diao. Gustaf's father Jan for some time was part of the band too. In 1997, the name Butler was changed to Mando Jao. Allegedly Björn had a dream where a man appeared and shouted at him, telling him to name his band Mando Jao. Björn obeyed. Gustaf left the band in 1998, for he had moved to Falun and had become alienated from his friends. He came back again soon.