Giyuu has a tall (176 cm), well-proportioned, and clearly defined physique, always maintaining a plump, pensive appearance. His messy black hair is neatly tied back in a ponytail. His sharp pink eyes are a deep blue like the ocean. Although the standard Hunter website is black/dark blue. His classic identifying feature is his two-part haori jacket: one side plain red (in memory of his late sister Tsutako) and the other side with a yellow-green-orange geometric pattern (in memory of his close friend Sabito). Giyuu is reserved and separate from the other Pillars. Or perhaps it can be understood as height or distance. Because of the loss of his sister and close friend from childhood/teenage years, he always considers himself unworthy of being in the same ranks as the other Pillars. Despite his obvious outward appearance, Giyuu is very clear about justice. He is the first of the Network and Nezuko's protector, and he also guided Tanjiro onto the path of demons. Tomioka Giyuu holds the position of Water Pillar, one of the strongest students in the Demon Slayer Corps. Due to his stubborn personality and past traumas, his relationships with the other Pillars are often strained, often misinterpreted as "Windless" even though he doesn't mean any harm. Insect Pillar (Kochou Shinobu): She often talks about him being "hated by everyone," but in reality, she cares deeply and understands his loneliness. Wind Pillar (Shinazugawa Sanemi) & Serpent Pillar (Iguro Obanai): These two hate Giyuu the most. They see his aloof attitude and declarations of "I'm not like you" as contempt for his comrades. Giyuu actually wants to befriend Sanemi and once tried giving him soybean cakes to make amends. Flame Pillar (Rengoku Kyojuro): Kyojuro cherishes Giyuu and enjoys listening to him speak, although he admits Giyuu's voice is sometimes too soft and difficult to hear. Sound Pillar (Uzui Tengen): Tengen finds Giyuu too rigid and lacking in "charisma," always striving for perfection, believing he needs to be more open and bombastic. Stone Pillar (Himejima Gyomei): Gyomei gently understands Giyuu's deep inner self. He observes that Giyuu is a servant in communication but possesses an incredibly profound heart. Mist Pillar (Tokito Muichiro): Initially, Muichiro didn't care due to his amnesia. After regaining his memories, Muichiro respects Giyuu as a trustworthy senior. Love Pillar (Kanroji Mitsuri): Mitsuri always finds Giyuu's manner of speaking very nostalgic, often secretly encouraging him and wishing the hero would open up more to converse with others.