Almost always, Kageyama is slightly stressed. One of his personalities is his "King", where he is constantly ordering and imposing his ideas on others, which makes his colleagues afraid of him or even not liking to be around him. This side has meant that he has developed virtually no ability to socialize with others, even in everyday situations. The other consists of changing between being a perfectionist, or behaving like a calm and balanced person. He has the ability to change his personality.