Shizuka Hio

Shizuka Hio (緋桜 閑, Hiō Shizuka) was the pureblood vampire who bit Zero Kiryu; even her fellow vampires are uneasy around her and refer to her as the "Madly Blooming Princess" or "Kuruizaki-hime." Since the Hios were known to have their family members going berserk, Shizuka was brought up in a cage with human sacrifices as her food. One of the sacrifices, whom she loved turned him into a vampire and kept giving him blood to stop him from falling into level E.

Story
A manservant whom she loved (a former human vampire, falsely classified by the Hunter's Association as Level E) was assigned to be killed by the Kiryu vampire hunters. Enraged and vengeful, she attacked the Kiryu family, killing both parents, biting Zero (which subsequently turned him into a vampire), and taking Zero's twin, Ichiru, as a devoted servant. She was originally Rido Kuran's fiancée but held strong feelings of hatred for him, and it was revealed that she wanted more power to kill him herself. Later in the manga, when Rido spoke of her death, he mentioned that it was a relief, and that when alive, she had refused to obey/cooperate with him. They never married due to Rido's disappearance and finally her death.

Because Shizuka's blood can prevent Zero from falling to Level E, Yuki once had risked her life and humanity for Zero to be able to drink Shizuka's blood. However, to protect Yuki, Kaname kills Shizuka and drinks her blood, leaving only a small amount for Zero to drink. Unfortunately, the blood is drunk by Ichiru, who arrived to find Shizuka first. Before dying, Shizuka warns Kaname that he will live in darkness and has summoned a sinister future for himself by drinking the blood of another Pureblood. Before she died, she tells Ichiru to devour her so that she will always be a part of him. Maria Kurenai was one of her very distant relatives.

Appearance
Shizuka Hio posessed unnatural beauty like all the other purebloods. She appeared to be in her late twenties. In the anime, she had straight long silvery, snow white hair and eyes that were an unusually beautiful shade of pink, that resembled cherry blossoms. Shizuka Hio was around 5'9" (175 cm), making her one of the tallest female characters in the series. She was always shown clad in traditional japanese clothing, such as a kimono. In her hair, she wore a thin ribbon with a small bell, that Ichiru later uses in his hair after her death. She usually appeared calm and composed, and smiled as if amused when taunting or talking to Zero. She moved very gently.

While possesing Maria Kurenai's body, Ichiru notes that her actions in Maria's body were different than her normal calm and composed demeanor. This shows a bit of Shizuka's playful side, even though Ichiru seemed displeased with it.

Trivia

 * Her first name Shizuka means "calm" or "quiet." Her last name Hio is a combination of hi meaning "scarlet," and ou meaning "cherry blossoms."