A slave driver from the planet Saturn, she formed the ruthless group of female foes called Villainy Inc. in Wonder Woman #28, the last story by Wonder Woman creator William Moulton Marston, but never appeared again. Her Golden Age race of aggressive ultra-rational Saturnian telepaths however may have inspired the DC Silver Age characters Saturn Girl and Saturn Queen, who strongly resemble Eviless in body and hair style, costume, powers and planet(s) of origin.
Eviless was introduced in Wonder Woman #10 (1944), but not formally by name until issue #28.
A slave driver from Saturn (later retconned as a subatomic earthlike world near or within Saturn), Eviless and Duke Mephisto Saturno (of the Saturnian Invasion Force) battled Wonder Woman. Although defeated by Wonder Woman, she later returned after being taken to Transformation Island. She pretened to die by controlling her heartbeat and stole the Golden Lasso. She placed a splinter in the lock of the Venus Girdle, meaning it did not affect her, though she pretended she had reformed and after taking control of a guard using the lasso she freed several prisonors from Transformation Island (criminals previously captured by Wonder Woman), and banded them together as Villainy Inc. The team was unsuccessful against Wonder Woman despite kidnapping her mother, and were defeated and captured.