He is voiced by Mitsuaki Madono in the Japanese version of the anime and Michael Adamthwaite in the English version, the latter of whom also voices Ginji Matsuzaki.
While completely loyal to Naraku, Byakuya was quite affable and polite, and insisted that others do the same. His appearance is very effeminate, and he was also shown to be somewhat sympathetic, expressing pity at Kanna's death.
Powers & Abilities
Flight - Similar to Kagura's feather, Byakuya used an origami swan as transportation.
Spying - Byakuya had the ability to detach his left eye to spy on Naraku's enemies from a distance.
Sword - Never used it in combat, but instead used it in the final battle against Naraku to capture Inuyasha's Meido Zangetsuha, in order to cut Kagome with it and trap her in the Shikon Jewel.