Would it flesh out Jinx's character if she had a flat-chest complex?
Given that Jinx is... not nearly as well endowed as the other League ladies, would it be good for Jinx's character if she was envious of buxom women? You could get a lot of comedy out of it, at least.
For instance...
to
: "You know Hat Lady, without your hat, I should really call you something else... like Boobie Lady!"
Plus, while it might seem like a bit of an anime-ish trope, the "A-Cup Angst trope" would make Jinx a tad easier to relate to for some. Surely IRL, there are SOME flat-chested women who want to have DD's. (Why do you think we have implant surgery, after all?)
to
: "You know Hat Lady, without your hat, I should really call you something else... like Boobie Lady!"