Blizzard, if you ever need a live-action Tracer for an Overwatch commercial, here’s your girl.
This is Hoteshi, a cosplayer from Russia, and almost everything about this Tracer is 100%, from the hair to the thick jacket to the armour to (a lot of people get this wrong!) a proper Union Jack on her shoulder.
You can see more of Hoteshi’s cosplay at her DA page.