Based on the novels Mistborn and The Well of Ascension by Brandon Sanderson, "mistborn" are people with the sort of powers that make hopping across gothic spires a regular method of travel. Black ash falls from the sky like snow and stains the city, and a thick mist fills the streets.

The garment she's wearing is a "mistcloak", described in the first book as being "made of hundreds of long, ribbon-like strips [...] sewn together at the chest and shoulders, but mostly they hung separate from one another, like overlapping streamers" (p.90). It doesn't do anything particularly magical, but it's the signature attire of the Mistborn. Aside from that, her knives are glass, her pouch has a cord that can be pulled to quickly drop it from the belt, and the character is described as usually wearing trousers and a shirt and being barefoot.

I try to get the details right.

Doodled in Manga Studio EX, not more than a couple hours work on the 9x12 tablet.