Otsuu

Childhood friend of Takezou and Matahachi. Otsuu was raised by Matahachi's family and arranged to marry Matahachi. Plans go awry when Matahachi runs off after the Battle of Sekigahara with Okou to Kyoto. Angry at Matahachi, Otsuu refuses Granny Hon'iden's offer to join the Hon'iden family and seeks life and love elsewhere. Currently she is traveling with Takezo's "apprentice" Joutarou in order to find him.

(Source: Wikipedia)