Umbras are the ultimate masters of stealth and infiltration. They hide in the shadows and in plain sight, becoming near invisible until they are ready to strike. Mastering the art of being unseen, they are said to become the shadows in which they hide in. Umbras rarely take their opponents head-on, preferring to fight when the odds are firmly in their favor. They are opportunistic fighters who do not play fair, though ideally they do not get involved in fights.

To an Umbra, the best fight is the one that they can finish before it starts. Cunning, clever and tricky, tactics often include "playing" with targets and getting them to reveal more information than they realize. Half-truths, lies by omission and "technicalities" are what they excel at.