Generic Rooster Teeth vendor:
"Come closer, come closer! Do you always wanted to be closer to your hero Pyrrha Nikos? Well now you can have her always with you! For just 19.99 you can purchase these vials which are filled with her ash… HURK" got stabbed from the back by a sword through the chest

I'll be relieved, and not really surprised, if that's the case. However i will be enraged if she's permadead, but have this clip if it turns out superhero logic applies to the RWBY world: