Sakuya, an enigmatic strategist within the King of Fist’s Army, operates alongside Souga as a secondary tactician. Her origins and motives remain shrouded in ambiguity, though she is disclosed as Gaiya’s sister and an adept of the Black Mountain Dark Form Fist. While ostensibly loyal to Raoh, she maintains clandestine communications with Toki in Cassandra, discreetly relaying intel on Raoh and Kenshiro—a secret known solely to Reina.

Her sharp analytical prowess enhances the army’s tactical edge, yet her veiled agenda and cryptic demeanor breed suspicion. During the clash between Raoh and Thouzer, she deems both unworthy of rule, condemning Thouzer’s absence of compassion and Raoh’s inability to embrace grief. This verdict hints at her vision of an ideal sovereign uniting both qualities, though she never names this figure.

Sakuya’s engagements often involve strategic manipulation, employing calculated distractions to secure battlefield advantages. Her dual role as both asset and wildcard fuels internal discord within the army. While her past and end goals stay obscured, her maneuvers persistently steer pivotal moments in Raoh’s conquests, subtly molding perceptions of authority and command.

Her ultimate fate remains undocumented beyond the anime’s events, absent from the original manga and expanded franchise lore.