Practicioniers of gymkata clearly.except that i cant make sense of how they could engage in a fight and end up in that especific stance... it looks so weird....
Gymnastics and martial arts combined awkwardly enough that it involves plenty of unecessary jumping and dancing around.
Or maybe they decided to meet one another for an obligatory make out session.In the metaphoric sense, it could be their encounter towards the beginning of Heart of the Swarm, using the Queen of Blades for stylistic reasons[/grasping].