Ann gave the players the address of "Salvatore's Secret Shop" largely to take care of this big fool.
While Kafney was looking after him, at least he wouldn't act too foolish...
Essentially, their relationship was similar to that of male college roommates—it could be said they were like father and son to each other.
They were all concerned about the big fool opposite them (as they saw themselves), trying to feed him something so he wouldn't accidentally starve to death.
Not long after Ann returned to Winter, once Dmitry had finished fussing... he sent his older brother away without mercy to mine using the "Salvatore Faction Gemstone Detector."
If they found the gemstone vein, it would ease the economic situation of the Winter Duchy a lot.
Building infrastructure was important, of course.
But the way Winter was divided into small sections by barrier enchantments unique to each city made it difficult to build roads.