Cygnus Hyoga is a Bronze Saint sworn to protect the goddess Athena under the constellation Cygnus. He sports blond hair and blue eyes, reflecting his Russian heritage from his mother Natassia, who perished in a shipwreck during his childhood. This tragedy forged a calm and reserved exterior that masks deep emotional attachments, particularly to his mother's memory. Trained in Siberia by the Gold Saint Aquarius Camus in the manga continuity, he mastered cryokinetic abilities by learning to arrest atomic movement through his Cosmo, generating ice and cold at extreme temperatures, including absolute zero. His signature techniques encompass Diamond Dust, releasing a barrage of ice crystals; Kholodnyi Smerch (Aurora Thunder Attack), an ice tornado unleashed via an uppercut; and the Gold Saint-level Aurora Execution, capable of freezing all matter. He also employs Kol'tso, an ice ring that paralyzes opponents. Hyoga's journey involves reconciling his Christian upbringing with his duty to Athena, frequently struggling between emotional ties and the Saints' code of emotional detachment. During the Sanctuary arc, Hyoga initially obeyed orders to assassinate fellow Bronze Saints due to hatred for his father, Mitsumasa Kido, but abandoned this mission after bonding with them. His conflict culminated in two battles against Camus, who sank his mother's ship to sever this emotional weakness. In their final duel, Hyoga attained the Seventh Sense, mastered absolute zero, and defeated Camus with Aurora Execution, despite his reluctance to kill his mentor. In the Poseidon arc, Hyoga confronted his former training partner Kraken Isaak at the Arctic Ocean Pillar, ultimately sacrificing his eye to repay a past debt. This act underscored his commitment to fairness and loyalty. In *The Hades Chapter - Sanctuary*, Hyoga and the other Bronze Saints don Final Bronze Cloths, upgraded by Athena's blood for enhanced durability and power. He participates in the defense of Sanctuary against the resurrected specters of Hades and former Gold Saints, aiding Athena during the 12-hour siege. Later, in the canonical sequel *Next Dimension*, Hyoga travels back to the 18th century with Dragon Shiryu to aid Athena in curing Pegasus Seiya from Hades' curse. During this mission, he clashes with the angel Touma and is proclaimed the future successor to the Aquarius Gold Saint. Hyoga's character development centers on transforming his emotional connections from perceived vulnerabilities into strengths. His dedication to loved ones and ideals remains unwavering, demonstrated by his willingness to sacrifice for justice and comrades.