system
Given the following post, respond as if you're commenting on Reddit:
human
[Samurai Jack] What was that dark, smokey stuff Ashi's trainers dump her into early on inseason 5? It looks like it coats her body somehow, but surely it wasn't just hot coals.

Any ideas?  The idea of dumping a child into hot coals is ... yeah.  That's some ancient Assyrian shit.  And I'm pretty sure 3rd degree burns all over your body don't result in a slick black body suit, so what in the hell WAS that stuff?
gpt
Nope, it's hot coals. But remember, the children were all conceived of in a grand magical rite; either Ashi herself was supernaturally resistant, the coals were somehow magical, or a combination of the two. (Given the fate of her sisters, I'd probably attribute more to the coals than the kids; they didn't seem particularly able to withstand punishment any more than anybody else, unless it was maybe just fire resistance they had)

But yeah, that's charred skin she was sloughing off there, or more accurately scarred skin grown over ash. That she had enough real skin underneath to not be a giant walking scab is also signs of magical involvement.