Main characters ; : :A 16-year-old boy who was killed by a Homunculi when trying to save Tokiko Tsumura. When Tokiko replaces his heart with a Buso Renkin to revive him, he decides to help in the fight against the Homunculi and is later asked to be an Alchemist Warrior by Captain Bravo, which he accepts due to his will to protect his sister Mahiro and his friends. His Buso Renkin is , a spear-lance with a cloth that can turn into energy for either propulsion or as a blinding light. ; : :A 17-year-old Alchemic Warrior. Seven year prior the series events, Tokiko's entire school was massacred by a Homunculi with only her surviving when Mamoru Sakimori came to the rescue. Due to the trauma of the event, she's extremely serious almost all the time. The incident also left her with a scar across the bridge of her nose which, although it could've been removed using alchemy, Tokiko decides to keep it as a reminder of her will to fight. Her Buso Renkin is , a set of bladed spider-like legs attached to her thighs controlled using her
synapses. ; : :A 19-year-old genius student, Chouno suffered from an unspecified disease but managed to save himself after learning how to make Homunculi through research notes left by his great-great-grandfather, initially experimenting with various animals. Later, he turns himself into a Human-type Homunculus and renames himself . He proceeds to murder his entire family, but is subsequently killed by Kazuki. He's later revived by L.X.E. and wishes to fight Kazuki again, but is prevented from doing so when his illness reemerges. Papillon then joins forces with Kazuki when he's being hunted by the Re-Extermination Squad and, in order to prevent his foe's death, re-creates the White Kakugane using Alexandra Powered's research. He and Kazuki finally have their showdown, which Papillon ultimately loses, but Kazuki refuses to kill him again. His Buso Renkin is , a mass of black gunpowder that he can manipulate to assume any form (usually a pair of butterfly wings) as well as remotely detonate at will.
The Alchemist Army In the manga, with the exceptions of Kazuki and the Hayasaka Twins, all members of the Alchemist Army (including Tokiko) have their names
annotated exclusively with
katakana (e.g. ), while all other characters have theirs regularly with
hiragana. Tokiko's family name, Tsumura, was annotated with hiragana (as ) for the first two volumes, however. ; : :Real name is , Captain Bravo is Tokiko's commanding officer and a veteran Alchemic Warrior. He abandons his name after the incident as Tokiko's old school, feeling ashamed of himself for being unable to save more than one person. After receiving orders from the Alchemist Army, he attempts to kill Kazuki twice, failing during his first attempt and later defending Kazuki from Sekima Hiwatari, using his Buso Renkin to protect both of them. His Buso Renkin is , a protective outfit that covers his entire body, except for his eyes, and is capable of hardening into a special form of regenerating metal when struck. ; : :A rookie Alchemic Warriors. Prior to the series start, he trained with Tokiko, developing a devotion to her. At first, he's jealous of the relationship Kazuki has with Tokiko, but slowly grows to admire him, eventually declaring him his "
rivals in love". He cooperates with Kazuki and Tokiko as they try to escape from the Re-Extermination Squad, despite being first designate for this team. He also help Tokiko in their last mission to defeat Papillon. His Buso Renkin is a pair of gear-shaped
chakrams that have a variety of applications, ranging from use as close-to-long range weaponry to increased mobility for Gota himself. ; : :An Alchemic Warrior Chief and Captain Bravo's former teammates, he was there during the failed mission to stop a group of Homunculi from killing an entire school alongside Shosei Sakaguchi and Chitose Hateyama. Hiwatari is the leader of the Re-Extermination Squad, a team commissioned to kill Kazuki, and is composed of himself and six other subordinate Alchemic Warriors. Hiwatari's Buso Renkin is , a
napalm bomb that allows him to manipulate flames. ; : :The Great Warrior Chief of the Alchemist Army's Asian Branch and Captain Bravo's former teammates, he was there during the failed mission to stop a group of Homunculi from killing an entire school and Chitose Hateyama. He prevents Hiwatari from killing Kazuki, proclaiming that defeating Victor is the Alchemist Army's priority. Shosei's Buso Renkin is , a gigantic knight-like robot that can materialize a large-scale version of any Buso Renkin manifested inside it.
Re-Extermination Squad The Re-Extermination Squad is a team led by
Sekima Hiwatari and commissioned to kill Kazuki. : :Another of Captain Bravo's former teammates, her Buso Renkin is called , a radar that also enables her to teleport objects. : :A shy girl whose buso renkin, , is a
gas mask capable of mixing all gas-type elements into either poisonous or explosive mixtures. : :A combative man whose Buso Renkin, , is a spear that heals any wound it's wielder suffers. : :An androgynous boy, his Buso Renkin is called , in the manga its a belt which can fire out balloons that shrink and seal people inside them, while in the anime, they multiply themselves when destroyed. : :A quite yet stern man whose Buso Renkin, , is a
ninjatō that creates pathways to another dimension when it cuts a solid object; : :A man whose Buso Renkin, , summons a flute which commands a pair of mechanical
military dogs.
L.X.E ; : :Real name , Doktor Butterfly is Koshaku's great-great-grandfather as well as the non-declared leader of the League of Extraordinary Elects (or "L.X.E." or short), a group of Human-type Homunculus. Apart from Papillon, he's the only person shown to have the skill required to create Homunculi. However, despite this fact, Doktor Butterfly attributes the leadership of the L.X.E. to Victor. His vast knowledge of alchemy comes directly from Victor himself, who, in exchange of teaching him, requested his assistance in healing himself. His Buso Renkin is known as , a platinum-white colored
chaff with different abilities based on whether its in its scattered or concentrated forms: In its scattered form, it has the ability to confuse a target's ability to determine things like direction and distance in addition to jamming electronics; meanwhile, in its concentrated form, it's capable of inducing hallucinations through simply looking at it. ; : :His real name is and is the closest L.X.E. member to Dr. Butterfly. He finds the Hayasaka twins while walking along with Butterfly and is always talking to him. He is a moon-shaped-head man who possesses , a Buso Renkin that allows him to create up to 30 slightly different copies of himself (in imitation of the 30 different phases of the moon). ; : :The former leader of the Alchemist Army and is the main antagonist of the series. A century prior to the series' events, he is severely injured by a homunculus, and his wife, Alexandria, creates the Black Kakugane to revive him. However, Victor loses his self-control and kills everyone in the lab, as well as injuring his wife, who becomes a
brain in a vat. He escapes from both the Alchemist Army and the homunculi led by his daughter Victoria, who is forced to become a homunculus, and goes to Japan. There he is healed by Doktor Butterfly. Victor's Buso Renkin is , a gigantic
battle axe that's capable of manipulating gravity.
The Hayasaka Twins Twins who're members of the L.X.E., the Hayasaka's were kidnapped as children and abused inside of an apartment room by a woman they believed to be their mother. When she eventually died, they were taken to a hospital by the police but soon learned their birth parents didn't want them, leading the pair to run away and live on the street until they were found by the L.X.E. and taken in as "familiars". In exchange for their services, the twins asked to be turned into Homunculi themselves so they could stay together for eternity. Armed with Kakugane provided by the L.X.E., they fought against Kazuki and Tokio but were defeated and nearly killed by the latter before she was intersected by Kazuki. Following the fall of the L.X.E., Ouka and Shusui would team up with Papillon in order to keep Kazuki alive and later help in the fight against Victor as well as joining forces with the Alchemist Army in the last mission to defeat Papillon. ; : :Ouka's Buso Renkin is , which consists of an autonomous robot named "
Gozen", a bow and a
gauntlet; the latter is capable of creating, loading and firing arrows for the user as well as producing a special arrow which can heal target's injury by absorbing and transfer them to wielder. ; : :Shusui is a
kendo master, and his Buso Renkin is known as , a
katana with a long cord attached to the pommel which is capable of absorbing and releasing energy.
Other characters ; :Kazuki's sister. ; :Victor's wife a century ago, who creates a black kakugane to revive her husband after he's severely injured by a homunculus. However, she ends up as a
brain in a vat after being injured by Victor. ; : :Victor's daughter a century ago, who was forced to become a homunculus and chases after him. ; : :A character from the
PlayStation 2 video game
Buso Renkin: Yōkoso Papillon Park e. He is Kazuki and Tokiko's son, who as a teenager travels back in time to stop a plot by Moonface. His buso renkin is , a trident-like buso renkin. ==Reception==