Interesting stuff in Ashe intro art:

We can see her gun on the mantle in her parents house here, presumably she later takes this from them.
There is a picture of her parents that doesn’t include her but does include a dog.

Face on wanted poster on screen. Probably not completely random from blizzard. Something for the future? At least is possibly someone who is also an outlaw around the same area so McCree and Ashe would know them/even one of the remaining 2 founders of deadlock?

Ashe looks 14-17 here (therefore Jesse is 12-15, he looks like he should be older than 12 here so they are both probably on the higher end of those ranges)
despite that probable age Jesse is still smoking.
Jesse’s wearing a bandana that looks like the deadlock green/yellow ones we see in the short (sans logo)
he’s also wearing something on his wrist in his more signature red and yellow colours we’ll later see on his serape
he’s also got a what looks like the tied ends of something (possibly round his arm?) Also in red
neither he or Ashe are wearing gloves, although the they both do now, the other two are
the mystery person on the right in blue appears to be flat chested so is probably intended to be maleperson in the left in brown is more ambiguous could have muscles, could have breasts etc. their jacket is more beaten up than other mystery founder who is reasonably pristine.

none of the other deadlock members in this picture seem to have the deadlock tattoo. Founder thing? Some other reason etc?

(Full set of Nesskain’s art here and part 2)