Although this isn't the first reference to Ireland in Overwatch, it's pretty damn cool to see an Irish-speaking character included one of the most popular videogames of the past ten years.
Moira is described as a support-class character and is voiced by none other than Irish-born actress Genevieve O’Reilly, who played Mon Mothma in Rogue One: A Star Wars Story. The character's backstory, meanwhile, has her as a Talon scientist who has the ability to use bionics to transport through the stage, as well as a healing beam that repairs teammates' damage.
The in-game profile describes her base of operations as Dublin, Ireland and Iraq (OK?) and "on the cutting edge of genetic engineering, searching for a way to rewrite the fundamental building blocks of life." As well as all this, it was also confirmed that Moira's in-game lines with feature cúpla focal as Gaelige, which is pretty neat.
Here's the introduction video - Moira will be added to the game pretty soon.