[…] I feel like this image was at least partially AI generated, probably specifically prompted to be in her style (maybe they trained a LoRA to make it match better). I don’t get why the only video they shared of them doing any shading/line-work is of some shading that isn’t even in the final piece. […]

My current theory is that they used the AI to generate the outlines of everything, then they colored it in after. The video actually is mildly concerning to me, as I fear that they're using it to mislead people into thinking that they actually did the line work by hand. I of course am not accusing them of this, as all I have is conjecture, but It's concerning to me nonetheless.