Ouko Yushima

Ouko Yushima 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 Kagerouza 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 shihakushou. 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 Kagerouza Inaba's attire

(Source: Wikia)