It's only been about ten chapters since her last for sure appearance that I can recall. For a manga with as many characters as this has, that doesn't seem all that long. Especially when she's in a different class year as the rest.autor finally remembered that sawada exists.
And this is why I rarely bother to read manga on a monthly basis. I wait till shit is done or mostly done and binge.@SylverDrawer They become pretty forgettable when you see them once a month, or even less if they're not in one of the chapters