Don't
Flavors that don't go together - pickles and cranberry-pomegranate juice.
There aren't many Marvel female characters that I'm a fan of.
Elektra (Let's pretend that she never appeared in those two movies.) as envisioned by Frank Miller ( before he did Batman, and Sin City, etc. ), and the Black Widow pre-Iron Man II. Scarlett Johansson doesn't do a bad job as the Black Widow ( Certainly much better than Jennifer Garner as Elektra) but IMO she just doesn't have the "deadly/sexy presence" of the comicbook original. And Emma Peel looked much better in a catsuit... Oh wait, that was a completely different Avengers, sorry.