So, now the villagers are only missing the F ability from the FISS standard of supers (flight, invulnerability, strength & speed). They pretty much are already unstoppable in any kind of combat in this world as a combined tank+dps+scout unit (baring a complete lack of fighting technique and likely need to be caught by surprise). Why do they need advanced metallurgy for weapons? I suppose bronze weapons would snap on first use if they really swung them.
Also just realized, given the outsized effect the vitamin boosted food & drink, energy drinks and beauty products have on these people (nm just normal food w/ earth fertilizer)... Valetta could basically build herself a comic superheroine body if she thought to/could convince Kazuma to get her some of the various remedies that promise to improve body growth (height, muscle... plot), cause in this world, they'd apparently actually work. If she's insecure already about her 'value' to him, it would be an additional avenue to pursue. smh