Ma Rainey

Gertrude Pridgett, or Ma Rainey (April 26, 1886 - December 22, 1939) was one of the earliest known American  professional blues  singers and one of the first generation of such singers to record. She was billed as The Mother of the Blues. She did much to develop and popularize the form and was an important influence on younger blues women, such as Bessie Smith, and their careers.

Project V13
The song "Slave to the Blues" by Rainey is played on the Project V13 website and was likely intended to be featured in the game itself.