Shin Canaan Praeses, younger twin to Shun Canaan Praeses, grows up orphaned in Agartha under the care of villagers after their parents’ deaths. Hardened by rigorous combat training from childhood, he adopts a guarded, self-reliant nature, masking initial coldness and distrust toward outsiders. His brown hair, cropped short after Shun’s death, frames black eyes, while his attire evolves from a white-and-blue kimono beneath a brown cloak to utilitarian gear suited for missions. Tasked by his village to recover the clavis crystal following Shun’s demise, Shin clashes with Asuna Watase when she confuses him for his brother. Resentment over the comparison fades as survival-driven alliances against Arch Angels and Izoku force reluctant cooperation. The elders’ dismissal of the retrieved clavis as incomplete propels him to pursue Asuna, unaware host to a missing fragment. His growing protectiveness manifests when he intercepts Izoku assaults, bearing wounds to shield her. Village loyalty fractures as Shin repeatedly chooses Asuna’s safety over obedience, culminating in open betrayal when he shields her from Agarthan execution squads. This defiance exiles him from structured duty, forging an identity rooted in personal conviction. Emotional walls disintegrate during a raw exchange of grief over Shun’s death; shared tears expose Shin’s buried yearning for familial bonds. In the decisive confrontation, Shin shatters the clavis to abort Morisaki’s resurrection ritual, denouncing the sacrifice of Asuna. His rebuke—urging acceptance of loss over destructive obsession—cements his moral stance against exploitation. After securing Asuna’s surface-world return, he remains in Agartha, symbolically severing ties to prescribed roles to walk a self-chosen path. Though publicly dismissive of Shun’s legacy, private reflections with Asuna reveal unresolved anguish and a silent pledge to protect those his brother cherished—a duality underscoring his battle between duty and concealed vulnerability.