Sensei is one of the League of Shadows' most senior members. He is also an associate of the Light, and directs the League of Shadows based on the Light's orders.
Sensei is an old, light-skinned man with white hair and dark brown eyes. He is completely bald on the top of his head, and the rest of his hair extends near his shoulders. His white mustache extends to his cheeks and under his chin. He has a large scar across his chest, and a smaller scar extending from his forehead to just under his left eye.
After the Fog was destroyed, Sensei informed the Light that they had successfully obtained data from STAR Labs, but were unable to get intel from Wayne Tech due to the young heroes' interference. L-2 remarked that they had an operative on the inside, and Sensei exuded satisfaction.