Yeah, people are acting like Blair's a human with dwarfism but she's a Dwarf, as in the Race from Norse mythology. She's not disabled and she's not a Tolkien Dwarf.
In Norse Mythology, Dwarfs come from a different world/dimension called Svartalfheim (Black Elf Home) and its debatable whether they are Dark Elves themselves or just come from the same place as Dark Elves, but considering that Light Elves are slender magic-using nature lovers it makes sense that, as their opposite, Dark Elves would be Stocky non-magical Technology lovers.
They're slightly shorter than humans (though not always), have dark skin and are good with smithing, crafting and inventing. That's why Blair's more comfortable in the garage with all the tools and the workbench. It's also why she likes the Mechs in Pacific Rim, cause they'd love robotic machinery.
Tolkien did them dirty, he made them shorter, uglier, gave the women beards, characterised them as greedy and insular, turned them white and changed the name from Dwarfs to Dwarves.