The word “two” in literature serves both as a concrete numeral and as a symbol for duality and balance. In epic narratives and ancient texts, it precisely quantifies objects or groups—such as the two layers of fat in Homer’s Iliad [1] or the pair of star-groups in Chinese myth [2]—establishing a sense of order. At the same time, “two” often underscores dramatic contrasts or partnerships, as seen in the paired characters in Conrad’s works [3, 4] or the twin figures of reconciliation and opposition in legal and philosophical texts [5, 6]. Whether marking physical divisions, as in architectural details [7] or the layout in heraldry [8], or emphasizing narrative dualities like the two cities of peace and war [9], the use of “two” enriches the narrative by suggesting balance, symmetry, and the interplay of complementary forces.