Akon

阿近

Akon is a member of the 12th Division's research institute and the second-best gigai scientist in the Research Institute.
Akon appears as a tall, eyebrow-less man with a jagged part in his hair and three short horns on his forehead (and a possible fourth, which is hidden by his hair). He did not have these horns when he was younger, 101 years ago.
Not much is known about Akon, except that he was the first to realize that Rukia Kuchiki's gigai was created by "someone working outside the laws of the Soul Society"—in his words, referring to Kisuke Urahara. He is usually seen with his two partners, Rin Tsubokura and Hiyosu. Together, they were in charge of monitoring the real world for any increase in Arrancar activity during the Arrancar arc. In Turn Back The Pendulum, he joined the Science Bureau shortly after its establishment by Kisuke Urahara, 101 years prior to the present day. Curiously, he did not have his horns at this time. In the present, he appears to get along quite well with Mayuri Kurotsuchi, far better than he did with Hiyori Sarugaki.
He is now one of the best researchers of the Shinigami Research and Development Institute under Mayuri Kurotsuchi's charge, and is also chairman of the Shinigami Men's Association.