User blog comment:Waters Knight/Monty Tweets About 'Dust Levels'?/@comment-10380701-20140514051036

I'd assume this is what Monty was talking about when comparing Ruby and Weiss' usage of Dust.

For example, Ruby is most likely a Lvl1 Dust user as she only uses them as bullets.

Meanwhile, Weiss controls Dust via glyphs. Which, I dunno, makes her at least Lvl2 or Lvl4?