Ogen Iga

Ogen, leader of the Iga clan and Ninjutsu master loses the love of her life to suspicion and lies. As a young girl, she falsely accuses Danjo of betraying her, and is left to live a lonely lifetime of regret.

Even in her old age, Ogen is still bent on revenge. If it were up to her, she'd see to it that every last Kouga member was obliterated, even Danjo. When the Iga and Kouga are permitted to do battle to determine the third Tokugawa Shogun heir, Ogen enjoys her last moments with her lover before the countdown to one begins.

(Source: FUNimation's Official Basilisk Website)