Keith Shadis

Keith Shadis (キース・シャーディス) is the head instructor of 104th Trainees Squad in charge of training them to become soldiers. He seemed to be a friend or have some sort of relationship with Dr. Grisha, as he knew Eren is the son of the doctor and praised Eren for his effort.

It is revealed that he was a former commander of Scouting Legion before Irvin Smith succeeded him.

His most notable feature is dark circles around his eyes which seem imposing and scary.