Definitely. In the comic universe, Natasha and Yelena share a sisterly bond. Their stories often intersect and influence each other.
Yes, Yelena and Natasha are sisters in the comics.
No, they didn't date in the comics. They have a complex sisterly relationship, but not a romantic one.
Definitely. Yelena Belova makes appearances in various comic book issues and story arcs. Her character has gained quite a following among comic fans.
No, she isn't. There's no indication of Yelena being asexual in the comics.
No, Yelena Belova is not typically depicted as asexual in the comics.
No, she doesn't. Yelena and Hawkeye have their conflicts, but she doesn't kill him.
In the comics, Yelena doesn't kill Clint. Their relationship is complex but not marked by such a violent act. There are various conflicts and resolutions, but not this one.
In some comic storylines, Natasha does die. But it depends on the specific comic series and plot.
Yes, in some comic storylines, Natasha Romanoff is depicted as sterile.
Natasha's fate varies in comics. Sometimes she makes it through, but there are instances where she doesn't. It all depends on the creative direction of the particular comic.