Shun Canaan Preases is a thirteen-year-old boy with long brown hair cascading to his shoulders and vivid green eyes. He dresses in a flowing white shirt paired with tailored black trousers. Hailing from Agartha, a concealed realm deep beneath the Earth, he is the elder twin of Shin Canaan Preases. Orphaned early, the brothers were nurtured by Agartha’s villagers and trained to battle perilous creatures plaguing their world. Shun’s mentor, a fugitive who fled to the surface, shaped his skills before his life was shadowed by an incurable disease that eroded his vitality.

During the narrative, Shun crosses paths with Asuna Watase, a girl frequenting a mountain hideout to tune into her crystal radio. When a monstrous creature assaults her, he swiftly intervenes, shielding her from harm. He confides his Agarthan heritage and hints at a personal quest. Upon parting, he bestows a protective blessing—a gentle kiss on her forehead. The next dawn, his body is discovered at the base of a cliff, where he had lingered under the starlit sky.

Shun’s selfless acts propel Asuna toward Agartha, driving her to unravel the enigma of his demise and the secrets of his subterranean world. His legacy endures through his compassion, courage, and unbreakable connection to Shin, whose fate remains intertwined with his own.