Chou-san

The demon lord's aide, functions as a conversational partner and recorder keeper of sorts. Shakes his detachable head at times to help organize his memory better.

Originally created by a certain previous demon lord for entertainment, recorder keeping function was added by a later demon lord.

Is somewhat knowledgeable about the history of the world from having read and memorized every book in the archive, but has developed a perverted personality due to most of them being erotic material.