Sheeva was the 4th and final new recruit for the new Bad Company. She was one of the few kind-hearted members of Bad Company and cared a lot about others. She was a boom baby, a result of experimentation done on unborn babies and as a result had inherited special powers that enabled her to move her mind into things and "make atoms dance", thus destroying them. She was also able to use it to help people too, like taking the pain from Mac when he had his arm blown off and then putting Rackman out of his misery when he was being stretched across a fissure.
Sheeva developed a bond with Danny Franks as the story progressed and ultimately sacrificed her own life for him at the Krool heart.