Nishinoya can be extremely impatient, excitable and impulsive. As Tanaka puts it, "he simply gets too fired up for his good.". He doesn't bother to filter his words and is therefore prone to blurting out whatever he's thinking in a loud and tactless manner. In-game, however, his attitude changes drastically as he becomes incredibly focused and serious, remaining calm and doing everything in his power to provide the support his team needs until the very end. For this reason, everyone in the volleyball club respects him greatly. He is shown to be incredibly hard-working,Nishinoya is a very energetic and temperamental person. His boisterous nature and crazy shenanigans can attract unwanted attention quite easily, which often goes badly for him. Although he hardly ever worries about the consequences of his actions (and may even revert to violence to vent out his anger on certain occasions), he is surprisingly considerate of his friends' feelings and insecurities. He has a quirky habit of spontaneously coming up with ridiculous names for the moves he executes while practicing receives. He is also unexpectedly shy when it comes to talking to girls he hasn't met before.Nishinoya is the shortest member of the team, standing at 159.3 cm (now at 160.5 cm as of chapter 207). Despite his shorter stature, he has a fairly muscular build. He regularly styles his wild black hair by ruffling most of it upwards, adding 10 cm to his height; the tiny tuft of hair that falls over his forehead appears to be bleached a dirty blond. His eyes are brown and slanted.