Crow Jane was one of the seven members of a super-secret Stormwatch team created by Henry Bendix. The team consisted of Apollo and the Midnighter, Crow Jane, the speedster Impetus, the spectral Lamplight, the super-strong woman Amaze, and the reptilian Stalker.
When the team took on their hero identities, Bendix erased all memory of their previous selves, so we know very little about Crow Jane except that her powers let her fly and use sonic attacks. She appears to be the Wildstorm Universe's equivalent to Black Canary.
When the team's first mission went wrong, Bendix disabled their transfer technology and let them die. Only Apollo and the Midnighter survived.
Years later, long after Bendix's death, the Authority and Stormwatch explored a secret bunker Bendix set up to clone himself into a super-powered body. The site was guarded by zombie clones of the first team, including Crow Jane, but the joint superhero teams put the zombie clones out of their misery.