Anna Kurashiki stands at the center of the OVA narrative. As the daughter of the mansion's mistress, she resides within the estate where events unfold. Her demeanor blends youthful innocence with careful masking of motivations behind a girlish facade.

Her background ties directly to the mansion's operations, where she wields control over its inhabitants. She demonstrates a distinct inclination towards manipulating guests who arrive seeking a prize, subtly hinting at their role within the estate's schemes by pointing them out as "this time's guests." This manipulation tests and draws out latent traits in individuals considered for specific roles within the household hierarchy.

Anna engages directly and frequently in the subjugation and use of the mansion's enslaved individuals, finding visible satisfaction in domination. Her methods employ psychological manipulation alongside orchestrating scenarios designed to elicit desired behaviors or reactions from inhabitants and trapped guests. Her actions are driven by the mansion's requirement for a new master, positioning her activities as part of a system identifying and cultivating individuals capable of fulfilling that role through the manifestation of specific, often extreme, predispositions.

Her involvement remains continuous and hands-on throughout the mansion's unfolding events. She operates with authority derived from her familial connection to the estate's leadership, leveraging her position to maintain the environment and its practices. Her interactions consistently focus on sustaining the mansion's peculiar dynamics and ensuring the continuation of its established rituals and power structures.