Ah, if only all your pals could display a limited range of emotions, sit silently on your desk, and draw power from a USB port.
Mr. Tengu reacts to various noises with light-up facial expressions. Just like normal human beings, Mr. Tengu's facial "emotions" include large block-mouth, narrow block-mouth, oval mouth, and mouth-that-turns-into-a-secondary-face mouth. A full chart of Mr. Tengu's multiple moods can be seen here.
[Via The Raw Feed.]