Munechika

Known as Munechika the Guardian. She is one of Yamato's military paragons, the Eight Pillar Generals, and bearer of one of the vaunted Akuruka masks.
As her title implies, she excels in defensive and siegebreaking tactics, and attacks against Yamato by barbarian hordes and organized militaries alike have fallen to the wayside before her prowess.
In peacetime, she acts as governess to Anju, who often selfishly ropes her into mischief.