Pegasus Seiya serves as the central character throughout the *Saint Seiya* franchise, including *Knights of the Zodiac - Battle for Sanctuary*. Raised alongside his sister Seika (also known as Patricia) in the Graad Foundation orphanage, they were later discovered to be unrecognized children of Japanese billionaire Mitsumasa Kido (Alman Kiddo in Netflix's adaptation). Sent to Greece's Sanctuary for six years of grueling training under the Silver Saint Eagle Marin, Seiya was separated from his sister. His enduring motivation is reuniting with Seika, who vanished while searching for him after his departure. Seiya appears as a young male with brown hair and eyes, standing 165 cm tall and weighing 53 kg. His typical civilian attire includes a red shirt, jeans, white sneakers, and red armbands. When clad as the Pegasus Knight, his armor consists of a red bodysuit with silver accents, featuring winged shoulder pauldrons and boot designs, and a Pegasus head emblem on the chest plate. His personality blends impulsiveness with unwavering determination. He refuses to surrender in battle, driven by fierce loyalty to his friends and the goddess Athena. Early portrayals emphasize his bluntness and hostility, especially towards the Kido family, though he matures significantly later, demonstrating strategic leadership and emotional depth in narratives like *Saint Seiya Omega*. He avoids fighting women unless forced and consistently shows mercy to defeated opponents. Seiya's core abilities stem from manipulating "Cosmo," the universe's primordial energy. This grants superhuman strength, speed (reaching Mach levels and eventually light-speed), durability, accelerated healing, flight via cloth wings or cosmic propulsion, and energy projection. His signature techniques are the *Pegasus Meteor Fist* (a barrage of rapid energy punches) and the *Pegasus Comet Fist* (a consolidated energy blast). He awakens advanced cosmic senses: the Seventh Sense during the Sanctuary arc, enabling light-speed movement and atomic destruction; the Eighth Sense mastered in the Hades arc, allowing soul and body control in the afterlife; and the Ninth Sense attained in godly confrontations, granting divinity-level powers. His journey begins by winning the Pegasus Cloth in a tournament against Cassios. He enters the Galaxian Wars to locate his sister, battling adversaries like the Black Saints and Silver Saints while gradually accepting his role as Athena's protector. During the Sanctuary arc, he awakens his Seventh Sense against Taurus Aldebaran. In the Poseidon arc, his cloth temporarily turns gold and he utilizes the Sagittarius Gold Cloth. The Hades arc sees him master the Eighth Sense to traverse the underworld. In spinoffs like *Omega* and *Episode.G Assassin*, he becomes the Sagittarius Gold Saint, inheriting Aiolos' legacy and demonstrating techniques like the *Atomic Thunderbolt*. He confronts deities such as Thanatos and Hades, his God Cloth enabling dimensional flight and resistance to divine abilities like soul destruction. Seiya is the reincarnation of past Pegasus Saints, including Tenma and the mythological "First Pegasus" who wounded Hades. This legacy underscores his fated role in divine conflicts, culminating in battles against Olympian gods where his "Power of Miracles" defies impossible odds.