Grava of the Earth colony Extal was a long-time fan of Star Boy, and wanted desperately to become a member of the Legion. Hoping to gain superpowers she foolishly jumped from a space ship into the tail of a passing comet - failing to realize that Star Boy had flown through a particular comet while inside a starship, rather than unprotected by anything more than a futuristic space-suit. The ploy worked and the comet gave her the ability to fly in the vacuum of space as well as the ability to emit various "comet-like gases."