Curaré

was a member of the Society of Assassins, and its deadliest and most infallible killer.

History
Nobody remembers Curaré's real name, and nobody has seen her face (apart from Batman II). (The only — blurry — photo of her is from an airport assassination.) But everybody knows she's deadly, and possessed an unending knowledge of killer tactics. She was an excellent martial artist, and was designed to kill. She possessed a scimitar that has an edge no thicker than a molecule. It could cut through anything and she often used it to deflect gunfire.

In the Society of Assassins, the price of failure was death, and Curaré was the first to run afoul of that rule when she finally met her match in the form of Batman and Barbara Gordon. Both of them, working together, managed to capture Curaré and saved district attorney Sam Young from her lethal blade. Curaré managed to escape, but then had to face the fatal consequences of her failure.

She, however, managed to turn the tables on the Society of Assassins, hunting every one of them down, erasing their minds, before they had a chance to kill her. She eventually destroyed the entire Society one at a time and can thus be inferred to be the best assassin left in the world. She was soon captured by Batman.

Background Information
Curare (spelled without the accent) is also the name of a poisonous plant used by some South American native peoples to tip their arrows, and by medical doctors as a muscle relaxant.

Curaré has no speaking lines, other than a few grunts.

The only person to see her face is Terry McGinnis when he fought her as Batman. And judging by his reaction it is assumed that it is disfigured in some way.

Batman Beyond

 * "A Touch of Curaré"
 * "Final Cut"