Slymenstra Hymen was Gwar's dancer, bodyguard, and occasional singer portrayed by Danielle Stampe.
Slymenstra contributed backup vocals on most Gwar albums during her time with the band. Slymenstra and Oderus Urungus are featured in a duet titled "Fire in the Loins," on the RagNaRok album. "Don't Need A Man," written by Michael Derks and appearing on Carnival Of Chaos, was the first Gwar song to feature Slymenstra solo on lead vocals. "My Girly Ways," featured on We Kill Everything, also featured Slymenstra in what would be the character's final song as a lead vocalist. Stampe left Gwar in 2000 but returned for one final tour with the group in 2002.