According to the official Overwatch website, Sombra is a hacker with a base of operations located in Dorado, Mexico. She is affiliated with Talon and formerly Los Muertos - two of the game’s factions.
Overwatch Sombra ability list:
(Also see: The Original Diablo Will Be Playable in Diablo 3)
Sombra is the second new character added to Overwatch this year. The first being Ana - a sniper with healing abilities.
Blizzard hasn’t announced when Sombra would be available for all but has mentioned she will be playable as a part of its Public Test Realm (PTR) next week. PTR is a service to test patches before release to the general populace. Along with Sombra, the PTR will have a new arctic map, Ecopoint: Antarctica, which is designed around 1v1 and 3v3 play as a part of a new mode known as Arcade.
For what it’s worth, we found Overwatch to be one of the year’s best games. There are various heroes to choose from, near perfect gameplay, and the promise of extended support and free content, most of which Blizzard has made good on so far.