Deeply traumatized by her loss, Baiken remains bitter over her family’s demise and is motivated solely by revenge, wanting to kill That Man beyond reason. A mannish woman and natural-born warrior, Baiken claims to have cast away her gender for the sake of her goal, and accepts the natural consequences of her actions, having solemnly consigned herself to damnation for her sins. As implied in Λ Core Plus, her quest entails the danger of giving in to her bloodthirsty side.
At the same time, Baiken is coarse, quick to lose her temper and impulsive, often taking action before thinking. An anti-social person, she seems to value others insofar as they can prove themselves in battle. Despite this, she tolerates Anji to a certain extent.
Having struggled with uncertainty in Λ Core Plus, her personality in Xrd seems to have mellowed slightly, allowing her to express herself less crudely towards people. While she still desires revenge for the death of her family, she knows when to prioritize the greater good of her people over her personal vendetta.
At the very beginning of the Crusades, the nation of Japan was destroyed by Justice, and those of Japanese descent—amongst whom were Baiken and her parents—were placed in colonies for their protection. However, while she was still a child, Gears raided the institution she was living in. Small and weak, Baiken could do nothing to stop the attack, and could only watch the chaos around her. During the raid, she lost her arm and eye, and witnessed the horrible deaths of her parents, who gave their lives to protect her, as well as her friends.
The massacre was the work of the Gears, but what was etched into Baiken’s memory was the image of a man surrounded by dancing flames and his creations. She became acutely aware, even in the absence of evidence, that he was an enemy. With an unfading memory of the event, Baiken vowed to search for the true identity of That Man and exact her revenge.