I have watched the wonderful cinematic released by Blizzard. I have read the Wikipedia indices of both Widowmaker and Tracer. They are soldiers fighting in a never-ending battle as well as characters in a very fun video game.
If your point of understanding is to make people uncomfortable about adversaries finding romance with each other in times of conflict,
Then why comment? This is fan art for a fandom I would love to a part of but cannot partake, so I share a positive piece of art instead of negative comment meant to prove an "understanding" that the hero and villain must stay in their tropes of good vs evil and not have any other feelings for each other.
And its "sir" as denoted by the title in my namesake "Lord Santiago"