My headcanon: She has her bucket of star paint with her, although what is on her brush right now is for the black bits between the stars. She’s still catching up on maintenance and artistic updates after her banishment, but progress is good. She uses the fireflies for inspiration… Or perhaps those are stars she painted in the air, and now that they have dries she is going to send them reverse-shooting-staring up to the positions they were individually crafted for?