Giyuu is a fairly tall young man of a lean muscular stature and pale complexion, who is almost always seen wearing a stoic expression. He has choppy raven-black hair of uneven lengths, with jaw length side-bangs, a low messy ponytail at the base of his neck, and bangs falling over his eyes in an choppy fringe. His eyes are sharp and moderately large, having irises a lapis blue color, and their pupils a navy blue, sometimes having his irises completely opaque and empty, just in lapis blue color, and are framed by thin eyebrows. Giyuu wears a black standard Demon Slayer uniform, tinted in charcoal color in the anime, consisting on a button-up jacket with golden buttons, stand collar and long sleeves, a white belt, and a tattsuke hakama pants wrapped by white kyahan, having a pair of white zōri with dark blue straps and tabi socks underneath being the same color as his uniform. Over this, Giyuu wears a haori that's split down the middle into two different halves: the right one in a carmine color, and the left one in a geometrically patterned rhombi prints, in green, dark green, orange, and yellow. These haori were later noted to have belonged to his late older sister, Tsutako Tomioka, and his deceased friend Sabito, he also was noted for having three step kids, Kaku Tomioka, Oldest son, Youmai Tomioka, Eldest son, and Keojuro Tomioka, Youngest daughter..

It was time for the Harshira Training to start.. Tomioka remained in his mansion, meditating..