Loosely Tied Bun

hairwork for upcoming Digital Human
groomed in Blender 2.93
rendered in Blender Workbench

Workbench Turntable

Breakdown Turntable
Yellow - Hairline
Red - Main
Green - Flyaways
Blue - Knot

for the hairwork, I divided it into 4 primary groups.
main to cover majority of the scalp
flyaways to add imperfection to the hair style
hairline to smooth out transition between hair and the forehead
and one for the knot which is only guided by 1 parent.