Nazuna is a vampire from birth, a rarity in her world. She was raised by Kabura Honda, who treated her with both affection and distance, and guided her through early life while instilling a sense of independence. Nazuna later attended a night school, where she befriended Kyouko Mejiro, a bright and kind-hearted classmate whose fate would later be shaped by the supernatural.

Eventually, Nazuna chose to live alone in Komori, where she led a nocturnal, unbothered existence detached from humans and vampires alike. Her world changed when she met Kou Yamori, a young boy exploring the night and offering his blood in exchange for company. Their bond became the core of the series, as Nazuna grappled with unfamiliar feelings particularly Kou’s desire to fall in love with her to become a vampire, a notion that deeply unsettled her.

Nazuna has a slender yet curvaceous build, standing shorter than Kou but with an older, more mature physical appearance. She has light, ash-blonde hair styled in a messy ponytail with long bangs, golden eyes, and sharp fangs, all signature traits of her vampire nature. Her usual outfit consists of casual, revealing streetwear most notably, a black cropped top and short shorts with a hoodie or jacket—fitting her confident and carefree personality.

Despite her teasing demeanor and provocative appearance, Nazuna’s expressions often betray a more complex emotional state, especially when she’s caught off guard by affection or personal conflict.

Nazuna is laid-back, sarcastic, and mischievous, often teasing Kou with suggestive jokes or playful insults. She has a sharp tongue and isn’t easily embarrassed, presenting herself as bold and emotionally impenetrable. However, beneath her aloof exterior lies a deep fear of emotional vulnerability and commitment.

Nazuna struggles with intimacy not just romantic, but emotional in general. She fears the pain of attachment and avoids confronting her own feelings, especially as Kou grows closer to her. Over time, she demonstrates genuine care and loyalty, fiercely protective of Kou and others she comes to trust. Her gradual evolution from a loner to a loyal companion and protector makes her one of the most emotionally layered characters in the series.

• Meeting Kou Yamori
  Nazuna’s journey begins when she meets Kou, a lonely middle schooler who starts roaming the city at night. Fascinated by his innocence and the taste of his blood, Nazuna strikes a deal: she’ll drink his blood if he keeps her company. Kou, in turn, declares his desire to become a vampire something that requires him to fall in love with her. Though Nazuna is uncomfortable with the idea of love, she agrees, and their nightly rendezvous begin.

• Confronting Her Past
  Nazuna’s past resurfaces when Kyouko Mejiro, her former friend turned vampire hunter, reenters her life under the alias Anko Uguisu. Their reunion is clouded by guilt, betrayal, and tragedy. When Kyouko threatens Kou’s life, Nazuna refuses to abandon him and steps up to protect both him and the vampires. In a climactic confrontation, she chooses not to kill Kyouko, ultimately helping her former friend find peace.

• Kou’s Transformation
  When Kyouko attempts to take her own life and Kou intervenes, he unexpectedly awakens as a half-vampire hybrid a transformation no one anticipated. Nazuna is both disturbed and protective, working alongside Kyouko to investigate Kou’s condition while supporting him emotionally, despite her discomfort with his growing intensity.

• Journey to Hokkaido
  Following Kou’s fallout with Mahiru Seki, Nazuna and a group of allies join Kou on a school trip to Hokkaido to reconcile with his friend. The trip turns deadly when Kou is nearly killed by the vampire Kiku Hoshimi, leading to a pivotal reunion with Mahiru. However, the trauma of these events and the evolving nature of Kou’s identity put a strain on Nazuna and Kou’s relationship, forcing both to re-evaluate what they mean to each other.