Ushijima is a quiet and stoic individual, not speaking very often, and often maintaining the same fierce expression on his face which often gives him an intimidating appearance. One of Ushijima's most notable characteristics is his tendency to bluntly, but honestly, say what is on his mind, causing him to come off as tactless or rude. Due to his limited social skills and being incredibly earnest, Ushijima can appear awkward and unintentionally funny. He does not seem to be able to read people or certain situations very well, and often takes jokes and figurative language from others literally. Despite this, it is noted that when Ushijima does give actual praise or support, it is completely sincere as he never sugarcoats or minces his words.