Mogami Yoshiaki

"The bald rat will soon learn he can not simply take any life he pleases."

- Mogami Yoshiaki.

Mogami Yoshiaki (1546 – 1614) was a powerful daimyo of northern Japan as well as a member of the Assassin Brotherhood. In order to solidify his political position, Yoshiaki sent his daughter, Komahime, to be wed to toyotomi Hidetsugu, nephew and heir to the Regent of Japan, Toyotomi Hideyoshi.

However, soon after Hideyoshi had a son of his own, and in order to secure his succession, Hideyoshi ordered the death of his nephew and his family, including Komahime. This enraged Yoshiaki, who immediatly turned his allegiance to Tokugawa Ieyasu.

Reference

 * Assassin's Creed: Memories