He has a tendency to bluntly 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. 

the future face of volleyball in Japan

normally seen to be nonchalant and playful towards his students, close colleagues, and friends. However, he is unsympathetic and cruel towards sorcerer executives; extremely confident in his abilities and reputation as a powerful sorcerer, believing himself to be invincible; despite his childish and immature behavior, deep down he is a very lonely and traumatized individual who is tasked to carry the burden of protecting the weak.