Perpetually sullen, arrogant, and undeniably short-tempered, Kageyama originally came off as a typical overbearing perfectionist, caring only about winning and completely disregarding the opinions and well-being of his teammates. Unbeknownst to the majority of his schoolmates and acquaintances, however, he is much more sensitive and childish than he appears to be; he simply does not know how to control his frustration, and hence expresses his thoughts and emotions in an inappropriate way. 