Highly effective soldiers skilled with all weapons systems, tactics, and hand to hand. Have mastery of at least two languages. Extremely polite and educated, they won't pick fights. If you absolutely need someone picked up or just dead, that's who you would want. Quiet, fast, and dead-on accurate. Normal and unassuming. When it all goes wrong, you want them in front - or if you're really fucking good, you'll be at their side.
Oh fuck man, I think that's delta out there. I'm gonna eat a bullet before they get here.