A quick test with some hairy brush presets.
In fact, for this one, I use only one brush, with a ink brush rendering.
Like all the tools of Krita, The potential is incredible, there are so many options to mix and test. And with the possibility to try different brush tips, the possible effects increase dramatically.

You can download the presets here and extract them in the ~/.kde/share/apps/krita

It looks nearly realistic! Especially when you used it with the black on the hair.

This I like. Lovely painting