Related Information for Agonist The Agonist (formerly The Tempest) is a metalcore band from Canada, signed to Century Media Records. Hailing from Montreal, The Agonist comprises vocalist Vicky Psarakis, guitarist Danny Marino, bassist Chris Kells, and drummer Simon McKay. Previous members include founding member and former lead singer Alissa White-Gluz. They released their first album Once Only Imagined on August 14, 2007. Released August 28, 2007, the video for Business Suits and Combat Boots was filmed by accla.. read more