Black Blood Brothers

Within the story, during the 1850s, 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...

Jiro Mochizuki (望月 ジロー, Mochizuki Jirō)[1]

Voiced by: Takahiro Sakurai (Japanese); J. Michael Tatum (English)

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.

Kotaro Mochizuki (望月 コタロウ, Mochizuki Kotarō)

Voiced by: Omi Minami (Japanese); Leah Clark (English)

Jiro's ten-year-old, "younger brother", who does not seem to exhibit powers of a vampire, such as the "Hide Hand."[1] 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.

Mimiko Katsuragi (葛城 ミミコ, Katsuragi Mimiko)

Voiced by: Ryoko Nagata (Japanese); Colleen Clinkenbeard (English)

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.

Cassandra Jill Warlock (カサンドラ·ジル·ウォーロック, Kasandora Jiru Vōrokku)

Voiced by: Miyuki Sawashiro (Japanese); Luci Christian (English)

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.

Left: Sei during the Kowloon Shock; Right: The current Sei.

Sei

Voiced by: Reiko Takagi (Japanese); Carrie Savage (Current Sei), Ian Sinclair (Sei during the Kowloon Shock) (English)

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.

Zelman Clock (ゼルマン·クロック, Zeruman Kurokku)

Voiced by: Jun Fukuyama (Japanese); Jerry Jewell (English)

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 War God Asura (闘将アスラ), 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 descendant of Asura, but he’s 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 boats unspeakable power for long and short distance battles. He is enthusiastic about combating and despite of all versatile behavior, he is a regular guy.

Cain Warlock

Voiced by: Hiroki Yasumoto (Japanese); Christopher Sabat (English)

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.

Crow/Kuro

Voiced by: Akimitsu Takase (Japanese); Brandon Potter (English)

Little is seen of this vampire. He is very skilled with a sword and refers to Jiro as his pupil. He is also a guardian of the Dark Princess of the North.

Zhang Lei Kao

Voiced by: Mugihito (Japanese); R Bruce Elliott (English)

Also known as Pile Killer Zhang or Chief Zhang. He used to be a vampire hunter, and is now a close ally of Sei. He now works for the president of the Order Coffin Company and is also considered to be one of the leaders in the Special Zone. He mentioned that it is an unwritten rule that the bloodline of the sage should not be messed with. Despite his old age, Zhang still holds enough power to kill a Kowloon child with nothing more than a wooden spike.

From L to R: Johan Tsang, Chan, and Kelly Wong

Kelly Wong

Voiced by: Mami Kosuge (Japanese); Monica Rial (English)

A vampire that tries to enter the Special Zone. She and a group of vampires tried to enter the Special Zone in hope of a better life. However, she is the only one in the group to successfully enter the Special Zone in the end, though deeply traumatized by the loss of all her friends and her surrogate daughter. After the Kowloon children start attacking the Special Zone, Kelly aids the residents in defense of the area.

Chan

Voiced by: Ayumi Tsuji (Japanese); Cherami Leigh (English)

A vampire girl that was born from the blood of Kelly Wong. Chan's mother begged Kelly to give Chan some of her blood so Chan could live because at the time Chan was very ill. Later Chan was bitten by a Kowloon child and controlled by Johan Tsang. In the end, Chan was killed by Kelly in order to stop her from being under Johan's control, as Chan was stopping Jiro from saving Kotaro, and she died in Kelly's arms.

Johan Tsang

Voiced by: Kyousei Tsukui (Japanese); Kent Williams (English)

A Kowloon child that hid his identity while staying with Kelly Wong's group. He later took control of most of the group members by sucking their blood and making them obey his command. He is killed by Jiro before he had a chance to enter the Special Zone.

Shougo Jinnai

Voiced by: Ken Narita (Japanese); Daniel Penz (English)

Shougo is Mimiko's boss and the head of the Compromisers team. He reports to the president of the Order Coffin Company and is also considered to be one of the leaders in the Special Zone. Like Zhang, he is a close ally of Sei.

Hibari Kusunogi

Voiced by: Mikako Takahashi (Japanese); Kate Oxley (English)

Mimiko's junior Compromiser. She likes gossip and often gets carried away with her speculations.

Badrick Serihan

Voiced by: Hisao Egawa (Japanese); Travis Willingham (English)

Head of the Order Coffin Company's Suppression Team. He is a strict man with a powerful build and absolute devotion to keeping the Special Zone safe. He is injured when Johan Tsang tries to enter the Special Zone, but still forces himself to fight overwhelming odds during the Kowloon attack despite only being able to use one arm.

Rinsuke Akai

Voiced by: Yasuhiro Takato (Japanese); Chris Cason (English)

A member of the Order Coffin Company. A happy-go-lucky friend of Jiro, Akai is the one to let Jiro off when he is caught by the Suppression Team. He is also the one who made arrangements for the ship which Jiro and Kotaro are seen traveling in at the beginning of the series.

Yafuri Chao

Voiced by: Motoko Kumai (Japanese); Brina Palencia (English)

A direct descendant of the Kowloon King of 10 years and is known as Cassa's "younger brother." He is extremely hot-headed and loves to fight. Despite his adolescent appearance, he is well versed in swordsmanship, martial arts, and vampiric power. He tends to act mainly on his own ambitions aside from his orders. His ambitions consist mainly of challenging strong foes, with the assumption that he will always win. He is easily antagonized, especially if he feels that he is not being taken seriously. He harbors a strong jealousy towards Jiro, although he angrily denies it. He is nearly beat to death by Cain, and is sliced into death by Jiro in the end.

Sayuka Shiramine

Voiced by: Kumi Sakuma (Japanese); Cynthia Cranz (English)

Zelman's personal assistant. She is a human who is also willing to let Zelman suck her blood.

Zaza

Voiced by: Kousuke Toriumi (Japanese); Todd Haberkorn (English)

Also known as "Walkerman" or "The Other" for his unique abilities to possess the body of others. He is Cassa's human brother who invited her into the Special Zone. While Zaza possesses someone, his human form is rendered asleep and is the subject of much humiliation by the cruel Cassa. He is impaled through the abdomen by Jiro's silver katana during the last battle of the Special Zone.

Mitaki Onezaki

Voiced by: Takashi Matsuyama (Japanese); Mark Stoddard (English)

The man who heads the Order Coffin Company. He was one of the few human heroes of Hong Kong and had created the Special Zone in the aftermath to hide the Kowloon King's ashes. He grew up in the Special Zone and transformed the area from slums to a metropolis in only 10 years. However, he has gotten too old to fight with Jiro on the front lines and thus must sit and manage situations rather than be directly involved. He refused to leave the Special Zone when it was under attack.

Alice Eve (アリス·イヴ, Arisu Ivu)

Voiced by: Omi Minami (Japanese); Leah Clark (English)

An old blood vampire whose bloodline was of the highest rank. She is the oldest vampire of the black bloods. Alice was considered the Mother of Darkness and the founder of the chaotic bloodline. Also known as the Sage. The bloodline of the sage is referred to as the bloodline that transcends death. She fell in love with Jiro during the 19th century and turned him into a vampire when he was on the verge of death. Sadly, she was killed during the Kowloon Shock by the hands of her best friend, Cassandra, but was shortly reincarnated as a newborn baby named Kotaro after her body turned into ashes.

Adam Wong (アダム·王, Adamu Won)

Better known as the King of Kowloon, and known as "father" to the Kowloon Children.[1] Adam is the Source Blood of the youngest bloodline of black bloods, the Kowloon Children. He is responsible for the Kowloon Shock and the Hong Kong Crusade. During the crusade he was defeated by Jiro Mochizuki, but presumably immortal, his ashes are sealed in Eleventh Yard and are highly sought after by his children.