Nobunaga Oda's right-hand-man who has loyally served her for many years. She is known as being very intelligent and very good at coming up with plans and tactics. Hideyoshi calls her "Akerin" because she greatly resembles a friend of Hideyoshi's, whom Hideyoshi called "Akerin," from our world.

Spoiler

She has romantic feelings for Oda, and often becomes jealous of Oda's friendly, older sister-like relationship with Hideyoshi.