Aikurō Mikisugi

Aikuro Mikisugi (美木杉 愛九郎)is Ryuko and Mako's enigmatic homeroom teacher. Initially appearing dull and easily flustered, he secretly observes and aids Ryūko by leading her to Senketsu. It is later revealed he is working undercover at the school as a spy for the Nudist Beach rebel group.
 * Voiced by: Shinichiro Miki

Personality
Aikurō can easily be described as flamboyant. However he can also be serious when he needs to. When undercover, he takes on the persona of a tired and unenthusiastic teacher.

History
He once worked as an assistant to Ryuko’s late father, Isshin Matoi, whom was one of the few that knew of the potential of the Life Fiber. After the death of Isshin, Aikuro received his letter that guided him to the whereabout of the Kamui, Senketsu, and the task to give Senketsu to his daughter.

To learn more about the Life Fiber, he infiltrated Honnouji Academy and went undercover as a High school teacher.