Natasha Romanoff, the Black Widow, hails from a dark past. She was orphaned during World War II and then taken in by the Soviets. In the Red Room, she endured rigorous training, both physical and mental. This training made her an expert in combat, espionage, and deception. Her skills are on par with some of the mightiest superheroes in the Marvel Cinematic Universe. For example, she can hold her own against the likes of Hawkeye and even Captain America in combat situations. Her origin story is a crucial part of understanding her character's motives and actions throughout the Marvel stories.
Well, in some comic arcs, Black Widow has met her demise. But comics often have complex and multiple storylines, so it can vary depending on which specific series you're referring to.
Black Widow isn't a redhead in the comics. Her appearance is subject to interpretation by different comic book creators, but red hair is not a common feature for her.