Delain is a symphonic metal band, formed in Zwolle, Netherlands in 2002. The band consists of Charlotte Wessels (vocals), Ewout Pieters (guitars), Otto Schimmelpenninck van der Oije (bass), Martijn Westerholt (keyboards), and Sander Zoer (drums). Delain was founded by Martijn Westerholt, former pianist of Within Temptation and brother of Within Temptation co-founder Robert Westerholt. Martijn left Within Temptation in 2001 after contracting Pfeiffer's disease. He started Delain in 2002.