Pegasus

Pegasus: the best friend of a democracy and the worst enemy of a dictator. Their Agents safeguard the liberty of the people around the world. Trained by and armed with the best humanity has to offer, they would love to see themselves as emissaries of a brighter future, but it doesn't always work out that way. When your closest friends are trained to look around and see nothing but enemies, when your superiors are incontestably powerful and equally incontestably fallible, when your entire body is built for the sole purpose of causing pain, who can you trust?

And no, "no-one" isn't a good enough answer.