Black Blood Brothers, also known as BBB, is a light novel series written by Kōhei Azano and illustrated by Yuuya Kusaka. In 2006, Studio Live and Group TAC produced an anime based on the series. It is directed by Hiroaki Yoshikawa. It was licensed for North American release by Funimation Entertainment, with the first DVD being released in February 2008.

Plot During a war called the Hong Kong Crusade, an Old Blood vampire, Jiro Mochizuki, a.k.a. the , fought and defeated the Kowloon king and most of the Kowloon Children. Ten years later, Jiro heads to Hong Kong with his younger brother, Kotaro Mochizuki, in hopes of reaching The Special Zone, a thriving secret city where Vampires live-(which is separate from the human civilized parts of the city). They soon realize that a plan to infiltrate the Special Zone is being hatched by the Kowloon Children survivors. As they travel to The Special Zone, Jiro encounters enemies from the past and new threats that may endanger the safety of the Special Zone including the citizens. Kotaro's abduction, by one of the Kowloon Children, thrusts him even further into the battle. Along the way, he meets a human girl named Mimiko.

Kowloon Shock Within the story, during the 1950s, a vampire who would later be known as the Kowloon King emerged in Hong Kong, China and began spreading his lineage to others. The Kowloon Children, as his bloodline came to be known, differed from other bloodlines in that all humans (Or vampires) bitten by a Kowloon Child would become Kowloon Children themselves, even without a direct infusion of that bloodline's blood. The ensuing chaos made the existence of vampires, which until then had been living in secret, known to the entire world. The conflict culminated in the Holy War, a battle in which humans and vampires worked together to exterminate the Kowloon Children. After the crusade, the Special Zone - a city for vampires to live - was established on the sea outside Japan. After the war, it was announced that all vampires had been killed, and most humans were kept ignorant of the existence of the Special Zone. Jiro Mochizuki, who became known as the Silver Blade, is a hero of the Crusade who defeated the Kowloon King, although he lost his lover and was betrayed by a close friend in the process...

Characters Main characters

An Old Blood vampire that sided with the humans to fight against the Kowloon children during the Kowloon Shock. Jiro was transformed into a vampire in 19th Century London. He used to be a lieutenant in the Imperial Japanese Navy until he was severely injured in a fight protecting Alice. Besides being an Old Blood, he also comes from a very special bloodline: the blood of the Sage. He wields a long katana which has a blade made of silver. During the war, after defeating most of the Kowloon children, he became known as the Silver Blade and the Kin-killer. He is able to use some of the Kowloon powers as well as those of his own unique bloodline to be able to challenge even the Kowloon King and the three powers of the Special Zone. He is weak against sunlight and water. He is shown being burned to the bones from staying into the ocean too long and releasing smoke under the sunlight, even though he was carrying an umbrella. He has a little brother, Kotaro, who is the only other vampire who shares his bloodline. He is considered to be the chosen Guardian. As the chosen guardian, he is devoted to returning the sage's blood, which resides within him, into her reborn body, Kotaro. He reveals to Mimiko that once Kotaro fully matures-(which is never explicitly known at the end) and he gives back the sage's blood, he will no longer be around. Since he took in Kotaro as a newborn following Alice's death, there's a chance that Kotaro could be his adopted son.

Jiro's ten-year-old, "younger brother", who does not seem to exhibit powers of a vampire, such as the "Hide Hand." Although, he seems to have an extremely high pain tolerance: as he is thrown into the ground and walls without injury in almost every episode. As commented by Mimiko Katsuragi, he does not appear to be the brother of Jiro since he is not hurt by sunlight nor water, unlike Jiro. Another fact is that they look totally different from each other: Jiro is tall, has black hair and brown eyes, while his brother is short, has blond hair, and blue eyes. Kotaro stated that they are brothers because they are the last two remaining vampires of their special bloodline. They both carry goggles around their necks. He has the same speech pattern and bears a striking resemblance to Jiro's former lover, Alice. Later, it is revealed that Kotaro is actually the reincarnation of Alice. He has no special vampiric powers because he still has not recovered the sage's memories from Jiro. Before leaving for the Special Zone, Kotaro's only friends were Sei's older sister the Dark Princess of the North and Grand Duke Bow-wow (a giant friendly grizzly bear) which he also gives the name to his teddy bear at the end of the series. Since he was taken in as a baby by Jiro, there's a possible chance that Jiro could be his adopted father.

Human compromiser who is sent out to mediate the relationship between humans and vampires. She was an orphan that was raised by the Order Coffin Company, which she now works in. Although considered taboo by the Company, she allowed Jiro to suck a bit of her blood when he was too weak to keep fighting. In the end, she ends up living and working with both Kotaro and Jiro. Mimiko and Alice have similar ideals. She is a strong and independent woman, who tries to understand Jiro's situation and shows that she holds no prejudice against any race.

Often referred to as the Black Snake, Cassandra is an Old Blood vampire that was once friends with Jiro and Alice, however she betrayed them and killed Alice. However, Jiro questions why Cassa, after killing Alice, guarded Alice's ashes. It is later revealed that she is the Lord of the Warlock family and is a reincarnation of Morgan the Witch. Her prestigious bloodline grants her the ability to shapeshift. She was also the first to be bitten by the founder of the Kowloon Children bloodline and was branded a traitor. During a brief conversation with Jiro, she claims that her happiest moments were with Alice and Jiro. Cassa is an extremely powerful vampire, capable of matching a fully powered Jiro in combat while not having absorbed any blood herself in three months. Her primary weapons are a chained silver cross and a katana. While Cassa is a skilled swordswoman, Jiro always had the advantage over her when it came to swordplay and fighting. Even as a Kowloon child, Cassa enjoyed playing jokes and teasing people. It is revealed in the end that Cassandra's goal all along was to resurrect the Kowloon King and continue his bloodline. Like all vampires, the continuation of their own bloodline is all that they care about, and Cassa is willing to make any sacrifice in order to ensure its survival. The few exceptions to this are the killing of Jiro and the ending of the Sage bloodline.

Other characters

Sei bears the title of Dragon King of the East, or "Ryū-Ō". He also bears the titles Prosecutor of the East and young emissary. He controls the night of Hong Kong and the Special Zone, protecting Red Blood and Black Blood. He's a direct descendant of a chaotic bloodline. Sei also created the barrier and implemented the restrictions that protects the Special Zone. His eyes are the "switch" for opening and closing the barrier. When he opens his eyes, the barrier opens, and vice versa. He could turn into an enormous golden dragon made of pure energy. The current Sei is a now reborn child but before that he was a young adult, mid to late twenties. This took place sometime within the past 10 years. Even though he was reborn into such a "cute" state (as Jiro puts it), Sei is serious and is one of the most powerful vampires in the story, which makes him highly respected. He could easily make a vampire uneasy with his powerful aura. He also has an older sister called the Dark Princess of the North. He is shown to, unlike Kotaro have obtained all his memories from a young age.

An 800-year-old Old Blood born in Poland on April 1 called Crimson-eye Zelman, and is the bearer of the god's flame and a legend of the Dark Ages. Zelman has many other titles, including the ancient dark hunter, the follower of the Fire God, the red-eyed murderer, and the prince with blood-colored eyes. He is also one of the rulers of the Special Zone. He comes from a glorious bloodline linking to the great warrior, Asura and is noted to be one of the last of that bloodline. Having inherited the special blood of , Zelman has a power called Eye Ignite, which enables him to create and control fire. Zelman Clock is a noble demon, he has his own code of honor and respect for freedom. He has a wild nature and devilish charisma radiating a certain superiority and greatness in everything. Don't try to expect compassion from him, he is provocative and cruel. But on the other hand his personality is more pleasant than that of first sight. The affable evil lord of the House of Darkness and self-proclaimed «bad guy». He makes friends with Kotaro pretty much the first time they meet, and is one of the most powerful vampires alive, helping to suppress the wave of Kowloon Child infection. He doesn't share the worldview and arrogance of his subordinate August. He is one of the leaders holding territories in the Special area and he controls the so-called group «The Coven». In spite of young appearance he is oldest alive vampire whom everyone must respect. He travels around the world but now lives in the Special area. This place surprises him because people and vampires live together, this fact is pleasant to him. He is not only a descendant of Asura, but also possessor of "divine fire". He can use "Eye Ignite" that helps to create a flame in sight. He is a perfect warrior, strategist and he boast unspeakable power for long and short distance battles. He is enthusiastic about combating and despite his versatile behavior, he is a regular guy.

An Old Blood who works alongside the Company within the Special Zone. Cain is a very strong vampire who has the ability to change into a blue wolf. He is known as a hero of the Kowloon Shock, Retainer of the Warlock family, the Knight of King Azami, and Cain the Blue Wolf. Cain is of the same bloodline as Cassandra and had served the Warlock family before her betrayal. He was also one of Alice's guardians before she died at the hands of Cassandra. He is now a loyal servant to Sei and head of the Marine Bank in the Special Zone. While Cain uses every chance to disrespect Jiro, he thinks highly of Jiro's powers and skills despite believing Jiro to be immature. Cain is a powerful sorcerer who seems to be some sort of werewolf; as he is depicted as a blue wolf in a flash back & during his fight with Yafuri Chao he exhibited a partial transformation which allowed him to easy beat Yafuri into submission. Dark Princess of the North Sei's older sister whom Sei greatly respects. Kotaro commented that both she and Sei do not like to talk much-(mostly his sister). The Princess has lived for a very long time and is also a descendant of the chaotic bloodline. She resides in the Sacred Precinct with Crow-(also known as "The Sanctuary"), where Jiro and Kotaro previously stayed at when Kotaro was just a baby. She was sad to see him go, so Kotaro consoled her by saying he will write letters to her when he reaches the Special Zone. Despite her quiet demeanor, she apparently has a short temper and while she enjoys Kotaro's company, if Kotaro does something that angers her-(such as when he accidentally sneezed on the scarf that she had made for him), the Dark Princess does not hesitate to hurt him. Her powers are great enough to warp and change the weather surrounding her.