Guts Man is similar to that of a typical construction foreman; while he can be hot-tempered, impatient and unreasonable, he is passionate about his line of work, is more intelligent than his appearance and mannerisms would initially suggest, and cares deeply for the well-being of his colleagues when on the job and his robotic brothers, acting as some sort of older brother to the latter. He also does have a genuine sense of humor, and seems to know his brothers' behavior very well.