This is Nasu no Yoichi who fought for the Minamoto, notice that horse archery is still most important/elite form of warfare during the genpei, and also that not all samurai wore helmets, some preferred these rather natty hats
Here's another reconstruction of a Heian noble in his military gear, definately a nice idea for a sort historical fossil unit for the Taira that would be a hangover from Heian era: