[Whistle.Concert]

Well, they're certainly more robotic than most. Their eyes are an LED screen, and can change to express their emotions.
However, they tend to become a bit...Quirky, at night. Wandering around, seemingly lost, and being aggressive to anyone that happens to be around after-hours.

They don't actually change colours to the 'darker' colours, it's just what they'd look like in a low light environment