Lori Lewis is an American opera singer currently residing in Salem, Oregon graduate in the University of Kansas, she is a vocalist and official member of the band Therion. Lewis is also the former singer for Aesma Daeva, a band that toured with Therion in Canada and the USA in 2005. In October, 2007, Lewis performed with both bands on the US/Canada portion of Therion's world tour (Aesma Daeva supported Therion).
On September 11 of 2011, Christofer Johnsson, Therion's head, announced that Miss. Lewis was named permanent member of the band, becoming then the first female member to have permanent status in the history of the band.