Ma Su emerges as a supporting figure entwined in a romantic relationship with Fengji, Guan Yu’s foster daughter. Their bond weaves a poignant subplot against the backdrop of the later Three Kingdoms period’s turbulent military campaigns and political upheaval. His narrative intersects with pivotal historical events spanning 211 CE to 234 CE, including Liu Bei’s westward expansion into Shu and the ensuing power struggles among the fracturing kingdoms. Ma Su’s role underscores the film’s exploration of personal loyalties and intimate tragedies unfolding within prolonged conflict, though specifics of his background, motivations, or actions beyond this romantic thread remain unexplored in the available material.