I don't really know. It could vary depending on the artistic style and the intentions of the comic's author. You might need to do some in-depth research or check with the comic's fan community for a clear answer.
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.