Pan Yuling, sister to Pan Guanglin, discovers the gravely injured Kenshiro Kasumi and nurses him back to health, revealing her compassionate nature. Her adopted father subsequently promises her to Mang Kuangyun as payment, creating conflict due to her burgeoning feelings for Kenshiro. Consumed by jealousy, Mang Kuangyun wipes her memories using pressure point techniques and abandons her with a nomadic warlord in Hebei province.

Adopting the identity Li Xiubao, she leads a horse bandit group conducting guerrilla warfare against the Imperial Japanese Army. This period fuels her intense hatred for the Japanese and sees her master Praying Mantis martial arts. As leader, she fiercely protects her followers; her warm-hearted nature earns their deep respect and admiration.

She eventually regains her memories upon reuniting with Kenshiro in Shanghai and later marries him. When her brother Pan Guanglin is crippled in an assassination attempt, she succeeds him as leader of the Qing Bang criminal organization. Her background includes a connection to Christianity. She possesses a unique ability to positively influence others, often disarming opponents through empathy.