@Fuko there's way less phytic acid in white rice than red or black because they remove the husk, bran and germ from it. So you don't get the antinutrient effect that the other two have. On the downside it's mostly sugar. I'd still say white rice is healthier than black or red rice, but only if the person's diet is otherwise nutrient dense, and it's not overconsumed.
OMG! SUCH PERFECT FORESHADOWING!! We've gotten just enough information in previous chapters about her family that Ashimitsu being her uncle makes sense and doesn't come out of nowhere but it is still surprising AF. MAN I LOVE THIS MANGA!!