Amélie Lacroix was married to an Overwatch agent named Gérard Lacroix. The criminal organization Talon was constantly trying to eliminate Gérard, and eventually came up with a plan to kidnap his wife and brainwash her into becoming an expert killer. After she was rescued, she kill Gérard in his sleep and was never seen again until making her debut as Widowmaker.
Powers and Abilities
Infra-Sight: Widowmaker's ultimate ability. Allows her to see her enemies through any walls.
Widow's Kiss: Widow's sniper rifle. The longer she charges a shot, the more damage it does. It also functions as an assault rifle.
Venom Mine: A small bomb that poisons anyone who triggers it.
Grapple Hook: Grapples Widow to any surface.
Can do some damage to armored foes.
Durability and Endurance
Was punched by DoomFist's gauntlet which could (supposedly) smash through skyscrapers, but there is no evidence of such.