A clever, scheming individual fixated on stealing the Crimson Armor to fulfill her ambition of conquering Japan. Her manipulations include feigning alliance with Nobunaga after Yoshimoto surrenders an armor piece while secretly harboring hatred and plotting betrayal. Physically, Ieyasu resembles a teenage girl with fair skin, red eyes, and long pink hair styled in a large ponytail with a thick fringe. She typically wears purple battle armor consisting of a corset top, belt, puffy trousers, and traditional Japanese sandals. In battle, she wields a Priestess Staff as her primary weapon. Her abilities center on mastery of dark magic channeled through her staff. This magic, described as running through her blood, enables destructive power, capable of leveling Nobunaga’s castle and parts of Owari when amplified by the Crimson Armor. She also displays high proficiency in physical competitions, contributing to ties against Nobunaga’s team in events like sumo wrestling, beachball, and karate. Ieyasu’s relationships reflect her duplicity. She maintains apparent respect and kindness towards Yoshimoto while exploiting her support. Her interactions with Nobunaga involve sustained pretense of friendship to access the armor. Hideyoshi nicknames her "Tokunyan" due to a resemblance to a modern friend; though Ieyasu openly brags her schemes to Hideyoshi, viewing her as harmless, Hideyoshi deduces her true nature early. Ieyasu commands a group of ninjas named Hanzo, whose frequent clumsiness undermines her plans and provokes her annoyance. Her story culminates in stealing the Crimson Armor from Date Masamune. Upon wearing it, she becomes possessed by its evil power, launching an attack on Nobunaga’s castle and destroying swaths of Owari with little regard for lives lost. This conquest ends when an alliance of warriors defeats her and destroys the armor. Freed from its corruption, she abandons her wicked ambitions, expresses remorse, and develops a genuine interest in befriending Nobunaga, signaling a permanent shift to benevolence.