Yaone's manga character design is actually one I like a lot (see icon!), even with the early wonkiness of Minekura's anatomy in general--check out the shoulders to hips ratio on this shot. A lot of it is that though her battle outfit is skimpy and ridiculous (WTF giant bow), she rarely stands in ways that emphasize it.
Even on the pictures that are all HELLO BOOBS they're rarely cheesecake shots. And while my good Yaone-pics are at home, she often stands like this--one arm under or across the breasts, gripping the other arm--which I've seen in body language I and other tall/large-breasted/awkward women use. It's interesting that as the series goes on / Minekura's art gets more solid / Yaone gets more confident, her stance gets more open, plus she shows more solid hips/waist/butt to go with the HELLO BOOBS. And we see her wearing perfectly sensible and comfy-looking cheongsams in her "off" time, suggesting the bow-bikini-chainmail-thing is (for whatever reason) just her work uniform.

[/END tldr; TANGENT inspired by icon-making-occasion I had for looking at literally every manga shot of Yaone ever and then Noticing Stuff]