Tried a different charcoal this time, denser/harder, didn't care for it as much, although you can get a sharper line. These are 1-minute drawings.
These are 2-3 minute drawings.
I think these are around 5 minutes.
These are getting into 10-20 minutes.
Here and in the next one, I started by covering the page in charcoal so that I was working from a medium gray tone. That is helpful because you can then "subtract" black from the page for the lighter areas (although it can be difficult to erase charcoal effectively). Subtracting is useful, because there is not a lot of shadow to work with; and with the light skin of the model it can sometimes be "easier" to compare the gradations of light tones than to find darker ones.