It looks like the artist is drawing the moment when Emma turns to diamond for the first time while all her students are killed during the Genoshan genocide. Not liking how he chose to sexualize that moment though. That was a traumatic moment for Emma. She would have been devastated to see all her students die around her instead of seductively and aloofly eating an apple. I hope he at least removes the skeletons of her students from the final image.