coruscate, v. to reflect brilliantly, to sparkle
maybe a bit of a loose interpretation of the definition but whatever.
warning: canon typical death mentions
—
After the war, nothing is the same.
At first, everything seems to be grey; grey and dull and empty, because sure Voldemort is dead, but so many others are too, both strangers and loved ones and her own brother-
Ginny throws herself into the dust, into helping rebuild what was broken. It helps, she thinks.
When she's moving rubble in the castle, or hugging near strangers who have been hurt like she has, or when she's having to coordinate with others and make schedules work for all of them; when she's throwing herself into work, and moving, and helping others, she doesn't have time to drift or stagnate. If she stops the dust gets her. If she stops she turns the same empty dullness as everything else, and if she stops, she doesn't know how she will continue.
The moving helps keeps the dust away, or keeps it moving off of her, around her, and so after months and months and years, when she and the rest of the wizarding world has been able to recover, she's still shining and bright, still refusing to crumble.