Watcher

 is a hero that was created for the pitch meeting for Prometheus, which became Overwatch. Her design is taken from unused Titan concept art.

She had the following abilities:


 * Staff Gun
 * Transfusion
 * Teleport

Trivia

 * Watcher or Watcher’s kit (specifically her Transfusion and Teleport abilities) may have been an early inspiration for Moira.