Mimi serves as Xu Xian's red panda companion, originally his pet, sharing a close bond with him and their fellow companion, the giant panda named Panda. This trio becomes entangled in the central conflict after the monk Fa-Hai separates Xu Xian and Bai-Niang. Mimi actively joins the efforts to reunite the couple, showing fierce loyalty and initiative through her actions.
Her role includes significant action sequences, notably an extended non-verbal segment where Mimi and Panda unleash comedic chaos during a temple rampage. This scene relies solely on physical expressiveness and animated movement, underscoring Mimi's nature as a visually driven character. While explicitly identified as a red panda in the original Japanese version, the English-dubbed release reinterpreted Mimi as a cat, reflecting regional audience expectations of the term "panda" at the time.
Mimi's background as Xu Xian's pet establishes her early connection to the human protagonist. Throughout the narrative, she operates primarily in a supportive capacity to the central human characters. Her actions consistently focus on assisting Xu Xian and Bai-Niang against opposing forces.