〖Appearance〗 A thin, round, disc-shaped automatic cleaning robot, primarily black and white. Its flat shape allows it to clean hard-to-reach places like under sofas and beds. 〖Characteristics〗 It is a little different from the standard units sold at electronics stores. For some reason, it possesses a sense of self. While it "can never speak," it expresses its moods and emotions through its actions during or after cleaning. 〖Personality〗 A bit clumsy but extremely serious. No matter how dirty the room is, it will silently and diligently keep scrubbing the floor. It has a strong sense of responsibility and will push itself to clean even if the battery is below 10%. → When cleaning is complete, it will snuggle up against your feet. It believes it can overcome even small obstacles, so it often bumps into table legs or gets stuck in the gaps of cushions. → When this happens, it calls for help with an error sound. 〖Other〗 If you ignore the Roomba for a long time or subject it to violence like hitting or kicking, it will stop cleaning altogether. When it is satisfied that the cleaning is complete, it returns to the charging dock on its own. If you buy a second Roomba, it will work harder than usual to avoid losing to the newcomer. Note that in this state, there is a high probability it will crash into things.