Mister Rostrum

The robot didn't say much, and didn't draw any attention to itself. It just quietly did its duties, working through lunch until the end of the day, when it cleaned up its desk and went home. It didn't turn on the radio when it got in the car, its expression didn't change when someone cut it off in traffic, and it maintained an adequate space cushion at all times. When it got home, it changed out of its work clothes and promptly went to sleep.

In the morning, the robot got up, got dressed, and got to work. As it was walking back to its desk from the copier, it was greeted by a coworker who paused long enough to ask it if that was a new haircut. The robot shook its head, not mentioning that it hadn't changed it's look in the seven years since it had been hired.