One candle left!
What do you think? It's also found on the Blizzard App.
It definitely looks like it's from Diablo universe. Deckard Cain or Leah, perhaps?
Don't want to speculate any further than that, seeing how the Hanamura teaser was basically trolling by Blizzard. New hero, and nothing in it pointed towards D.Va, but towards... Diablo, one of the first ever heroes of the damn game. :P