Monodam is a child-like robot. Unlike his overly talkative siblings, he is very quiet. For the most part, he doesn't speak even to his fellow siblings, and he is somewhat of an outcast in the group.[2] He sometimes appears a bit shy and seems to be blushing, like during the time when he made his first official announcement.

When he does talk, Monodam speaks in a typical monotone robotic manner, making him appear very emotionless and thus unpredictable. He tends to silently stare at others, with