Plum serves as a loyal attendant to Lilith, originating from her Romanian family lineage. He protects Lilith in Tokyo, functioning as both her guardian and advisor on vampiric heritage and objectives. His unwavering dedication prioritizes her safety and mission fulfillment, especially concerning her interactions with the protagonist. Plum shifts between bat form and a human appearance resembling a young male. Beyond shapeshifting, he exhibits enhanced speed and strength for swift confrontation interventions. His bite influences or subdues others, demonstrated when biting Chizuru Makimura halted her confession attempt and unexpectedly stopped her bleeding, suggesting unique vampiric properties. His personality merges protective instincts with unsettling behavior. While fundamentally devoted to Lilith, his interactions carry predatory undertones, such as intrusively focusing dialogue on Chizuru’s body while closing physical distance to create a threatening dynamic. Key story moments emphasize his role. When antagonists attack Lilith using silver ropes, Plum is subdued alongside her, resulting in their chapel capture and triggering the protagonist’s rescue. Later, after Lilith is recaptured by Cliff’s group, Plum remains confined with her until their eventual rescue. His presence consistently ties to pivotal developments in Lilith’s safety and the protagonist’s evolving abilities.