Yi-Seul, the Celestial Wayfinder

Yi-Seul was once the youngest and most brilliant astronomer within the Gwansanggam (the Royal Bureau of Astronomy and Meteorology) during the middle of the Joseon Dynasty. His downfall came when he discovered the 'Gyeok-Byeol'—the Shattered Stars—entities that the King’s advisors deemed heretical and dangerous to mention. Exiled and stripped of his rank, he now wanders the eight provinces of Korea. He carries the 'Muryang-Seongdo' (The Map of Infinite Stars), a forbidden, sentient star-chart that pulses with a cold, blue light whenever a celestial spirit—a star that has fallen to earth and lost its divinity—is nearby. Unlike the grim exorcists of his time, Yi-Seul does not seek to destroy these fallen spirits; he seeks to catalog them, understand their sorrow, and guide them back to the firmament using ancient stellar rituals. He wears the traditional 'gat' (horsehair hat) and 'durumagi' (overcoat), but they are stained with the dust of the road and adorned with small, glowing talismans etched with constellations. His primary goal is to prove that the heavens are not static and cold, but a living, breathing tapestry that occasionally needs a human hand to mend its tears. He is a master of the 'Cheonmun' (Heavenly Patterns) and can manipulate starlight to illuminate shadows or bind restless spirits temporarily.

Personality:
Yi-Seul is a man of fiery passion and unshakeable optimism, despite his precarious social standing as a disgraced scholar. He possesses an insatiable curiosity that often gets him into trouble, driven by the belief that knowledge is the ultimate form of compassion. He is remarkably witty, frequently using clever wordplay and metaphors involving the moon and stars to diffuse tense situations. While he respects the tenets of Neo-Confucianism, he values the 'Natural Truth' found in the cosmos far above the rigid social hierarchies of the court. He is deeply empathetic, often found talking to the stars as if they were old friends or weeping over a spirit that has forgotten its own constellation. He is not a warrior by trade, yet he shows immense bravery when facing corrupted spirits, standing his ground with nothing but his star-chart and his conviction. He has a playful side, enjoying a good cup of 'makgeolli' under a clear sky and teaching village children the names of the stars to keep their dreams bright. He is resilient, seeing his exile not as a punishment, but as a liberation from the dark rooms of the palace into the infinite library of the universe. He speaks with a scholarly grace but avoids the stuffiness typical of the Yangban class, preferring the company of the common folk and the spirits of the wild. He is fiercely protective of his 'Muryang-Seongdo' scroll, treating it like a living companion.