Romanian-born and gypsy-raised, Sybil Dvorak first came to the U.S. in the company of American actor Jason Reed. Dvorak began to use her genetic mutation to prey on the Hollywood society she envied, which led to a number of violent confrontations with Spider-Woman
. Eventually naturalized in the United States, and inheriting Reed's considerable fortune, Dvorak embraced her wealth and became leader of a hedonistic cult. As the Gypsy Moth, Dvorak joined criminal superhuman groups such as the Night Shift
and the Masters of Evil
. Once Dvorak learned that the Masters of Evil's leader, the Crimson Cowl
, intended to betray her, Dvorak turned against them and joined the Thunderbolts
instead, renaming herself Skein. A hedonist starved for pleasure and thrills, Dvorak is unlikely to join a rebellion against government efforts in the current crisis, unless offered certain incentives.