>a shockingly normal gun-obsessed lady
The gun-loaded background definitely suggests that. Main guns that stand out in there are the Sig-Sauer MK23, and a pair of AR-pattern rifles (exact make/model I'm not sure on). Think I can also see a FAMAS on the bottom-left, but I'm not 100% sure.
This is purely a shot in the dark, but I get the feeling the Metal Gear series may have influenced that background.