Ikkyuu

Ikkyuu serves the Ashikaga House. He is the chief advisor for Ashikaga Supergod.

It is hinted in Sengoku Rance that he is in fact a youkai.

Appears in: Sengoku Rance

Trivia
See Ikkyū for historical reference. The Japanese wikipedia entry noted that recent research suggests Ikkyuu might be the son of Ashikaga Yoshimitsu, third shougun of the Ashikaga Shougunate.