Byakuya has slate gray eyes and long black hair, which he keeps up in intricate white headpieces called kenseikan ( Pulled Star Insert; Viz “Pull Star Silence”), which symbolize his nobility as the head of the Kuchiki Clan, wearing three on top of his head and another two on the right side. In addition to the standard captain uniform, he wears a white scarf, which is woven by the master weaver Tsujishirō Kuroemon III. The scarf is made from Ginpaku Kazahana no Uzuginu (Gauze of Silver-White Flurry of Snow in Clear Skies; Viz “Silvery-White Windflower Silk Gauze”) and is a family heirloom, having been handed down from generation to generation and given to each head of the Kuchiki Clan. The scarf alone is worth ten mansions in the Seireitei. He wears fingerless white tekkō which only cover the back of his hands.
17 months after Aizen’s defeat, Byakuya wears hairpieces at the back of his head, but it is noted that these hairpieces are not kenseikan.He wears a variation of the captain haori, featuring a high collar with light gold edges and small, light gold tassels attached to the corners. The white scarf is no longer part of his attire. Ten years after Yhwach’s defeat, Byakuya returns to wearing three kenseikan on top of his head.