Ōko Yushima (由嶌欧許, Yushima Ōko) is a Shinigami of the 12th Division and worked in the Shinigami Research and Development Institute. He was the developer of the Mod Souls. Yushima bears a great resemblance to both Nozomi and Kager�za Inaba, having long green hair and brown eyes, but no yellow hair and a more narrow jawline with less-define cheekbones. During his time with the Tenth Division, he wore the standard Shinigami shihakush�. After he was transferred to the Twelfth Division, however, he donned a long yellow robe that buttoned up in the front and protruded upwards from his neck, covering the entirety of the back of his head, in the same fashion as Kager�za Inaba's attire (Source: Bleach Wikia)