Widowmaker (the blue girl) was brainwashed and experimented on by an evil organization and made the perfect sniper. That's why she seemed robotic and her skin in blue.
What Widowmaker said at the end was “Adieu Cherie”. It’s French for “Goodbye love.” It’s sort of meant to mock Tracer’s (the British one) tendency to call people “love”.
Widowmaker is not a robot. She was a normal woman until a terrorist group called Talon kidnapped her. She was brainwashed and then sent home to kill her husband. After she did just that she returned to Talon and was officially called the Widowmaker. Talon then continued to genetically modify her body to slow her heartbeat which is a useful skill for a sniper as it stops your body from moving so you get a more stable zoom. That's also why her skin turned blue.
So, I have never seen your channel before, but found it when looking for Overwatch reactions. I hope you'll do more! The robots (called Omnics) are not all nice and peaceful, though many are. Some have been very violent and destructive and there's tension between them and humans. I suppose you could say it's like a futuristic version of racism, more like species-ism. The blue-skinned chick is named Widowmaker, she's not a robot. She's human but she's been modified in various ways to be a perfect assassin, lacking emotion, etc.
Modern day secret service would have their subject GONE in seconds. This will never age well as a result of special forces reality. I love this short but the VIP in question should not have died.