Kyuubei Yagyuu is a prominent character in the anime and manga series Gintama. As the heir to the prestigious Yagyuu clan, Kyuubei was raised as a boy despite being biologically female, to fulfill the family's expectations. She is a highly skilled swordswoman and is known for her strict demeanor and loyalty, particularly to her childhood friend Otae Shimura. Throughout the series, Kyuubei plays a significant role in both comedic and dramatic storylines, often wrestling with her identity and familial duties.