Xiao Xun Er is a core character in the anime series 'Doupo Cangqiong', also known as 'Battle Through the Heavens'. As a member of the prestigious Xiao family, she is known for her exceptional beauty, intelligence, and mysterious background. Xun Er has a deep connection with the protagonist, Xiao Yan, and plays a vital role in his journey of growth and discovery. Her loyalty and secretive nature are pivotal to the unfolding of the series' plot, as she harbors powerful secrets about her true identity and lineage.