AUTONOMOUSLY ACTING ROBOT THAT CHANGES PUPIL IMAGE OF THE AUTONOMOUSLY ACTING ROBOT

A monitor is installed in an eye of a robot, and an eye image is displayed on the monitor. The robot extracts a feature quantity of an eye of a user from a filmed image of the user. The feature quantity of the eye of the user is reflected in the eye image. For example, a feature quantity is a size of a pupillary region and a pupil image, and a form of an eyelid image. Also, a blinking frequency or the like may also be reflected as a feature quantity. Familiarity with respect to each user is set, and which user's feature quantity is to be reflected may be determined in accordance with the familiarity.