Shane originates from the Momotarō story zone, sharing this background with Tao. The two share a surrogate sibling relationship formalized by a vow of brotherhood, and Tao considers her part of his family. Her past includes recognition as a demon who lost her horns, a detail noted by Onihime.

She operates at her own pace with an ethereal demeanor. Despite this seemingly detached disposition, Shane demonstrates perceptive abilities that allow her to discern underlying truths, making her a valuable asset. She possesses a notable interest in customized weapons.

Within the combat system, Shane fulfills the "Shooter" role classification. She joins the mission to counter Chaos Tellers, entities distorting established fairy tale narratives and altering predetermined fates. Her actions contribute directly to the group's efforts to restore original storylines across various fairy tale worlds.