Who am I?

I am the thankless defender of my castle. My badge hangs proudly around my neck as I stand, tall and still, gazing out the castle depths for any sign of trouble. Sometimes, a stranger approaches our entrance and I ward him off before he knocks our reinforcements in. My King and Queen often admonish me for being too enthusiastic. I gladly take the scolding if it means that they are safe from the trespasser they call “the Mailman.”

Each day, my King and Queen leave and I am left to guard the castle all alone. Though it is a thankless job, it is a duty I take most seriously. I reassume my position and patiently wait for their return.