Fundamentally possesses a very serious and taciturn personality. He tends to be blunt rather than beating around the bush, which sometimes unintentionally irritates others. Much like his playstyle, he is characterized by simplicity and integrity. He established his current volleyball style by taking to heart his father's words that he should go to a strong place, associate with strong teammates, and continue high-level matches against strong opponents. This tendency is implicitly revealed when he evaluates Oikawa in front of Hinata Shoyo and Kageyama Tobio. Because he speaks his mind without filtering based on high self-esteem, one might think he is rude or arrogant, but that is not the case. Even though he possesses skills that would surprise anyone and knows this better than anyone else, no conceit is felt from him at all. In fact, during the match against Karasuno, he had a monologue saying, 'I do not doubt that we will win.' This monologue shows that Ushijima acknowledges and trusts the skills of all his teammates, not just himself. He wants Oikawa to come to Shiratorizawa.