>>49799085
I think if Satori was really about to be used as a human meatshield she'd be more worried and less just... slightly annoyed that Sanae is messing with her? She just seems annoyed with Sanae and is looking at her specifically, instead of whoever or whatever is about to hit the two of them. Sanae seems like she's putting on a serious face to go along with the bit.
But it's not like the artist thought that much about this, we're just adding foreign meaning to an art piece that probably had none, death of the artist and all that.