Katsu is a female ninja or "kunoichi" under Hattori Hanzo. Trained in the same Iga ninjutsu as Hanzo, she accompanies William on his travels. Kunoichi are as skilled as warriors and spies as male ninja, but are also able to masquerade as powerless women to encourage targets to let their guard down, or disguise themselves as maids to gather information. Katsu's mastery of every aspect of the ninja way is said to rival even her teacher Hanzo's and makes her a strongly trusted figure.

Okatsu's father is Tokugawa leyasu. Her elder brother Nobuyasu was killed at an early age, allegedly to ensure the safety of leyasu himself. She has borne a grudge against leyasu ever since, and left his household as soon as she could to study under Hattori Hanzo. She despises not only leyasu but all samurai—and, indeed, the entire bloody, warlike world she is forced to live in.

Katsu has spent years under Hanzo, gathering rumors about yokai and information about strange phenomena likely to be Amrita—related from around the country. She is highly experienced and a master of disguise, able to infiltrate any location. Katsu is skilled in the art of the kodachi dagger and the shuriken throwing—blade, but considers these a last resort, as she is reluctant to harm people, even for the sake of the mission.

At first, Katsu was suspicious of William, a foreigner who claims to be able to see spirits, but she eventually warmed to him. In William she feels great ninja potential, seeing him make more effective use of his skills than she ever could. But, at the same time, her competitive side will not let her defer to him so easily, and when she crosses blades with William she does so in deadly earnest.

Over the course of their battles, Katsu became interested in, even fond of William's way of thinking and approach to life, so different from the Japanese samurai she knew. However, she never revealed this interest to William, and he left Japan without saying a word to her. For her part, she made no attempt to follow him or persuade him to stay.

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ฝ่ายอำนาจที่ต้องการสร้างสันติภาพให้แผ่นดินญี่ปุ่น ตามประวัติศาสตร์เขาคือโซกุนที่ตระกูลเขามีอำนาจมาอีก 250 ปี


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ดวงวิญญาณที่มีลักษณะเหมือนเด็กทารกอาศัยอยู่ตามต้นไม้หรือสร้างที่คนสร้างขึ้น พวกมันมักจะชอบอาศัยที่ศาลเจ้าในป่าเป็นบ้าน แต่บางครั้งก็มีการหลงทางเกิดขึ้น ถ้าเราบอกทางกลับบ้านกับมัน บางทีมันก็อาจจะมีรางวัลให้เรา

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มีตัวตนในประวัติศาสตร์จริงเช่นกัน อ่านข้อมูลเพิ่มเติมจาก Wikipedia: [Link]