Well, shit, I thought Viv canonizing fanart was a coincidental exaggeration, but then I’ve looked through some Helluva Boss themed fanart, including the period between the premiere of the pilot in November 2019 and the first episode in October 2020. Some visual character traits, like young Blitz having dotted teeth resembling braces, were made way long before that design was implemented in the episodes. This is creepy…
It also looks like that most of the mentioned fanart-turned-canon depictions are done by an artist called
TeaTheKook, who doesn’t seem to officially work on the show.