Read more about Diva (Blood+) at: Wikipedia

Official Site: Production I.G

The Blood+ anime, light novel, and manga series features an extensive cast of characters designed by Chizu Hashii and created by Production I.G and Aniplex. The series is set within fictionalized versions of various real-life cities: Okinawa, Japan, Hanoi, Vietnam, Ekaterinburg, Russia, Paris, France, London, England, Fayetteville, North Carolina, and New York, New York.

The central character of the series is , a seemingly ordinary teenage girl who was adopted a year before the series begins and who has amnesia. Her life is dramatically changed when she learns that she is a chiropteran—a vampire-like creature—who was born in 1833, that survives by drinking the blood of others or receiving it through blood transfusion, and is the only one who can destroy other chiropterans and her twin sister . Saya and Diva are the "queens", the first and more powerful of chiropterans which are always born as twin females. Aiding Saya in this century long quest is an organization called the , with a man named assigned to be Saya's primary "handler." With Saya forced to return to her former life, she is reunited with , her chevalier—a special form of chiropteran created by feeding a human the blood of a queen which causes a powerful bond to form and compels the chevalier to serve and protect his queen at all costs.

As the series progresses, it is revealed that Diva has five chevaliers to aid her, , , , and . They have formed their own organization, Cinq Flèches, which they use to create additional chiropterans from Diva's blood. Working against both sides are the , a group of escaped artificial chiropteran created by Diva's group who attacks both sides in search of the blood of Saya, Diva, or one of their chevaliers in hopes one will be the right blood to save them from a fatal and painful disease they call the Thorn.

The Red Shield is an organization dedicated to killing Diva and chiropterans. The organization was started by the grandchildren of Joel Goldschmidt, who first found Saya and Diva in 1833 and raised them at the Zoo. Joel took care of Saya, while his assistant Amshel provided for Diva's basic needs. Joel was killed by Diva in 1883 on his seventy second birthday after Saya released her from the tower to sing at his birthday party.

Diva (Blood+) has not been a contender in any CBUB matches.