Sarasvati, known as Saras, is a vampire ninja and high-ranking clan member acting as Seraphim’s superior. She lives under the human alias Kirara Hoshikawa, balancing her clandestine duties with a public career as the idol Lovely Kirara and co-managing a café. Her striking appearance features long black hair, crimson eyes, and a composed demeanor, often dressed in a school uniform or casual attire: a sleeveless cardigan, frilled tank top, red skirt, and boots. Her idol persona adopts a Gothic aesthetic with vampiric wings and a dark overcoat. A disciplined enforcer of her clan’s traditions, Saras gradually challenges norms by embracing her idol career. She initially orders Eucliwood Hellscythe’s assassination for attracting Megalo threats but later allies with Maelstrom’s faction to seal the Underworld’s gates, rescinding the contract. Her dynamic with the main group shifts from adversarial to protective, notably saving Ayumu, Seraphim, and Haruna during Eucliwood’s absence. Her relationship with Ayumu Aikawa evolves through comedic obsession—fixating on his physique—to genuine affection. She pursues him aggressively, citing vampire ninja customs to justify declarations of eternal love and interpreting indirect kisses as marital bonds. Over time, she adopts playful yet possessive endearments like "My Darling," culminating in a ambiguously legal marriage certificate by the series’ end. Combat skills include water-based blade creation, elemental manipulation, teleportation, swordsmanship, and martial arts. Beyond battle, she plays the violin, a relic of her clan’s orchestral past, and excels as an idol, blending theatrical fan interactions with café management. Saras navigates dual loyalties to tradition and personal ambition, softening rigid protocols to permit subordinates like Yuki Yoshida social freedoms. Her arc weaves authority, comedic romance, and emotional growth, cementing her role as both a strategic leader and a whimsically persistent suitor.