Sadie (サディ) is a Visual Kei J-Rock Band. Their aggressive and at the same time melodic music has already pushed them to the forefront of the Japanese rock scene. The band started in early 2005 and included the members Aki, Sora, Mao, Mizuki and Tsurugi. In that year, they released the maxi-singles: kokui no shita no yokubou to, kunou no hate ni mita hyakkei no yuritachi and -dekiai-.
In January 2006 drummer Sora left the band because of "artistic differences", thus welcoming the new drummer Kei. Their first mini-album, "The Trend Killer", saw its release on May 3rd, 2006.