Which of the following characters from the game "Overwatch" was revealed to be homosexual in December of 2016?

The character from the game Overwatch that was revealed to be homosexual in December of 2016 is Tracer. This was confirmed in a holiday comic released by Blizzard Entertainment, the game's developer. The comic portrayed Tracer as being in a same-sex relationship, marking her as the first LGBTQ+ character in the game. The reveal was a significant moment for LGBTQ+ representation in the gaming industry, and it was praised for its inclusivity and progressiveness.