Haruka is a tall, young man with short, straight black hair and blue eyes. He always retains serious expression on his face and never seems to show any kind of emotion. He seems to wear his swimming jammers everywhere. As pointed out by members of the swim team on multiple occasions, all of his swimsuits look virtually the same (they are all black swim jammers, but with slightly different patterns of violet), yet he claims they all fit differently.[2]

His typical school uniform consists of light-brown trousers, a white shirt with a green necktie, a dark gray unbuttoned blazer and blue sneakers. During the spring and summer, he would wear his summer uniform, which consists of gray trousers, a white shirt with a dark gray collar, a green dotted necktie and blue sneakers.