The protagonist, a former princess of Tang and daughter of the former Crown Prince Li Jiancheng. Driven to seek revenge by her uncle's murder of her father, mother and older brothers, she pursues revenge for her family. Presumed dead, she hides her gender, her identity, and her name in order to survive in a life of revenge and calamity.

She is incredibly intelligent and observant, seen when she managed to learn a language fluently in roughly two years with probably no tutors, and the ability to quickly draw conclusions and form strategies. She is an incredibly gifted strategist and skilled with a sword and crossbow.