K1-B0 (Kiibo), the Ultimate Robot, is a fairly serious and polite character. Many of the things he says and does can be considered comical, as he does not quite understand social interaction, and cannot read the mood. Kiibo is very proud of himself, and often brags about his various functions, and how they can help the other students. Despite all of this, he is easily angered by any sort of prejudice against robots.