So far there is little to say about him as an individual. From the basics, we can say that he is serious, decisive and does everything with a cool head. At normal times, he may be calm, because when fighting with Rinny, he defended himself with a serious but calm face and practiced punches on Rinny. However, if you really make him very angry, as shown in the episode where Rinny almost beat him to death, he almost becomes a killing machine or a rabid dog.