This is a dynamic-animated version of the Symmetra hairstyle, originally created by @Teadium.
This mod uses extended hair physics and therefore it requires Loader v5.45 or greater. If you are unable to use the Loader, or if you find that the hairstyle misbehaves in conjunction with advanced Animtools positions, then you may have more success with the Static version.
Symmetra Dynamic Hair 5.9 by stuntcock
Dynamic hairstyle for Symmetra of Overwatch