Nightshade
Eve Eden is a princess from the alien dimension Land of the Nightshades. As a small child, demonic invaders conquered her dimension, but Eve was teleported to safety on Earth.
Living in exile on Earth, Eve developed her hereditary powers of teleportation and creating shadow-like energy forms while working as a government agent. She joined the Suicide Squad on the condition that she could lead the team back to her home dimension and overthrow the demonic invaders. The mission ended badly - the demons were defeated, but her home dimension was left dead and lifeless. Eve was deeply affected by this, and her attitude and appearance both became colder and lifeless.