Hero Twin son of Asdzą́ą́ Nádleehé (Changing Woman); twin brother of Naayééʼ Neizghání (Monster Slayer). Per the canonical Diné Bahaneʼ tradition, the twins have different fathers despite the same mother and same simultaneous birth: Monster Slayer was fathered by Jóhonaaʼéí (the Sun), Born for Water by a waterfall (Tó — water — naturally fathered him through Changing Woman's contact with the falling water). The dual-paternity twin-conception encodes the foundational Diné cosmological-elemental complementarity: sky-fire vs. water, the two foundational generative-elements brought together through the divine mother. With his twin, undertook the canonical pilgrimage to the Sun-Father's house in the eastern sky to claim paternity-recognition and receive weapons; accompanied his twin in the homeland-purification monster-slaying cycle, with Born for Water serving the canonical-supportive-role: holding the lightning-arrows, providing reconnaissance, performing the protective ceremonies. The Hero Twins' complementary roles — Monster Slayer the active warrior, Born for Water the supportive ritualist — encode the Diné cosmological-elemental complementarity in the heroic-narrative form. Demigod-tier per registry math (Changing Woman deity-mother registered; waterfall-father is a foundational-element-class non-personalized father not warranting standalone registration). The strict-pass treatment treats the waterfall-paternity as element-class rather than spirit-class, preserving Born for Water's strict-pass eligibility — a deliberate registry-judgment that elemental-class fathers (water, wind, fire, earth as foundational generative-substances rather than personalized spirit-beings) are categorically distinct from forbidden spirit-class parents.