<P> To protect its cities against a massive omnic that rose from the East China Sea, the South Korean army developed automated battle mechs, deployed in a task force named MEKA (Mobile Exo - force of the Korean Army). As the omnic learned from its battles with the South Korean military, it disrupted the mechs' drone - control abilities, forcing the army to turn to human pilots . They elected to recruit professional gamers, who they believed possessed the necessary skills to pilot their mechs . Hana Song was the reigning StarCraft II world champion at the time, with a reputation for playing to win at all costs and showing no mercy to her opponents . She has since become a global icon, streaming footage of her combat missions . </P> <P> D.Va was the fifth Overwatch hero added to Heroes of the Storm, released in May 2017 shortly after the game's version 2.0 update . </P> <P> D.Va is voiced by Charlet Chung . </P> <P> Orisa is a one - month - old, four - legged female Omnic built by 11 - year - old robotics prodigy Efi Oladele, to be a "mechanical peacekeeper" of Numbani . Her primary weapon is the Fusion Driver, a long - range projectile - based machine gun; its alternate fire mode, Halt!, releases a slow - moving projectile that the player can detonate to draw in nearby enemies towards the point of detonation, similar to Zarya's Graviton Surge . She can launch a deployable Protective Barrier similar to Reinhardt's shield which can be used for strategic defenses, and can Fortify her structure to temporarily prevent all forms of crowd control against her, such as Lúcio's sonic blasts or Reinhardt's Earthshatter abilities . Her ultimate ability is Supercharger, a deployable device which gives Orisa and her teammates, provided they are in line - of - sight, an attack boost similar to that of Mercy, though the Supercharger itself can be destroyed by enemy fire and deactivates after a few seconds . </P>

Who was the first character added to overwatch