Characters

Ai Amo surfaces during the stretch of the story that revisits Sakamoto's earlier years. Married to the man who leads the JAA, she stands apart from the assassin world herself, glimpsed mainly as a window into the family life tied to the…

Akira Akao is a first-year student at the JCC who chases the memory of her assassin aunt. Guided by a rare vision that maps the routes to a kill, this shy but stubborn teenager slowly grows into a capable fighter while searching for the…

Amane Yotsumura is a young JCC assassin-in-training driven by grief over his mother and a burning hatred of the JAA. Grandson of the legendary Byodo, he fights with a bladed four-section staff and a razor-sharp mind, even as the ordinary…

Aoi Sakamoto is the wife of Taro Sakamoto and mother of their daughter Hana. Running the family convenience store, she is the very reason a legendary killer hung up his trade, a fearless woman who taught her husband to value every life he…

Apart is a serial killer turned reluctant ally who cuts through the Death Row Prisoners Arc. Obsessed with order and desperate to connect with other people, he dismembers his victims using near-invisible wires, a horror born from a…

Asakura is a researcher at the Okutabi Lab and the adoptive father of Shin Asakura. His experiments accidentally handed the boy his mind-reading gift, a mistake that strained their bond before the two eventually found their way back to…

Atari is an esper who once served as the JAA's secret fortune teller, her flawless readings steering most of the organization's choices. When her predictions about Slur suddenly began to miss, suspicion of betrayal landed her in the…

Atou was an examiner for the JCC, a composed professional who treated even a mid-air disaster as one more phase of the entrance test. Her knife work set her a step above her fellow examiners, though it could not save her from the chaos…

Bacho is one half of the Twin Assassins, fighting beside his older twin brother Son Hee. A remorseless killer with a taste for cruelty, he swings a pair of dao swords with lethal, practiced skill.

Boiled is a Dondenkai assassin and JCC graduate who serves as a main antagonist of the Amusement Park Arc alongside his partner Obiguro. Fixated on being hard-boiled, he hunts Sakamoto over an old grudge, armed with an explosive gauntlet…

Byodo works as a humble janitor at the JCC, yet his impossibly precise memory makes him the living database that Shin and Sakamoto spend so long hunting. Grandfather to Amane, he is a calm old man whose recall outstrips any computer.

Carolina Reaper is a fire-breathing subordinate of Slur and the older sibling of Club Jam, serving as a major antagonist of the Assassin Exhibition of the Century Arc. Fiercely possessive of his brother, he wraps his scarred face in…

Club Jam serves the rogue killer Slur and stands as the younger sibling of Carolina Reaper. A masochistic hypnotist who bends whole crowds to his will by chanting dessert names in reverse, he emerges as one of the central threats during…

Daikyo works as a low level guard inside JAA Jail, watching over some of the prison's most dangerous inmates. Loud and easily rattled, he finds his backbone when the assassin Tenkyu strikes, throwing himself into a doomed fight so the…

Dump is a cyborg serial killer who slipped an execution in Southeast Asia and reached Japan through Slur. Ruled by a craving for love yet convinced people look cutest as they die, she strikes with spikes buried in her frame before Osaragi…

Erio Muto is a JAA executive with his eyes set on the organization's top chair. Cold enough to kill one of his own underlings to prove a point, he abandons that ambition the instant Slur's envoy Haruma arrives and effortlessly drops his…

Etsuko Satoda is a retired assassin turned instructor at the JCC, where she drills students in the craft of killing. A master of Aikido famed for coming back from every mission unscathed, she once trained Taro Sakamoto and his peers, and…

Fukumitsu is a minor player in the JCC Infiltration Arc who runs the JAA's Western Japan Headquarters. An elderly official in traditional dress, he sits among the association's regional leadership during the storyline's wider power…

Gaku is a laid-back but savage assassin in Slur's X's Organization, raised in the Al-Kamar Orphanage that failed to mass-produce Order members. Treating combat like a video game he can pause for snacks, he becomes a major threat across the…

Geisha is a minor assassin of the JCC Infiltration Arc who serves under Satoru Yotsumura. Fighting with a deceptively lethal wagasa umbrella, she takes open pleasure in blood and violence before falling to the Order member Osaragi.

Gozu is an electricity-slinging assassin under Slur in X's Organization, one of the children engineered at the failed Al-Kamar Orphanage. Idle and playful but fiercely loyal to his fellow survivors, he shocks his way through the Order…

Granny Miya is a holistic healer who patches up assassins, earning the nickname God Hands in their world. Sakamoto counts her as the one doctor he truly trusts, and her skill is said to mend any wound short of death.

Hana Sakamoto is the young daughter of the retired hitman Taro Sakamoto and his wife Aoi. A cheerful elementary schooler born after her father left the assassin trade, she brightens the family shop while staying largely unaware of the…

Haruma is a towering assassin under Slur in X's Organization, one of the orphans from the failed Al-Kamar program. Turning the rules of sport into a killing method with a set of iron shot-put balls, this laid-back fighter stands as a major…

Heisuke Mashimo is a peerless sniper whose single, extraordinary talent once left him unemployable and destitute, sleeping in a patched tent above the city. After Sakamoto sees the value everyone else missed, the tearful gunman trades…

Higuchi is a bald, heavily pierced hitman from Taro Sakamoto's past who treats morality like a scoreboard, banking 'virtue points' through small good deeds in the hope that the gods of killing will keep him alive.

Hoshi is a guard on the lowest floors of the JAA prison whose entire focus is shielding the young oracle Atari, a duty she pursues with grim seriousness and open contempt for anyone who treats the girl as a mere tool.

Hotta is a class-skipping student at the JCC assassin academy who appears in the infiltration arc, one of the many pupils caught up in the campus-wide worship of the killer known as X. He is a background figure defined mostly by that…

Hyo is a towering, unarmed brawler of the Order who clawed his way up from being dismissed as the least gifted assassin of his generation. Loyal to the JAA yet quietly kind, he dies in Bangkok shielding the young sniper Heisuke from a far…

Ikari is a barefoot, anchor-wielding assassin hired to guard Tasuku Ando, whose fixation on his charge dates back to a shipboard clash with a younger Sakamoto and Shin more than eight years earlier. He is a deceased minor antagonist.

Inoda is a gas-masked JAA assassin who fights with a power-boosting gauntlet and cares about how his fellow veterans look to the rookies. He meets his end at Gaku's hands during the raid on the JCC.

Inoue is a stern, scarred instructor at the JCC assassin school who appears in the infiltration arc, unnerved to discover that a new student shares the surname of the Akao who once beat him senseless.

Iriya is the aged communications coordinator of the Japanese Association of Assassins, the messenger who routes the organization's information to its assassins. He is a minor, elderly figure listed among the group's dead.

Jay Erk, who brands himself Kill Baby, is a swaggering JCC exam repeater sitting the test for a fifth time. He talks a bigger game than he can back up, wilting the moment a real threat or the wrong weapon lands in front of him.

John Paichy is a minor character in Sakamoto Days, a human man whose life spanned two very different pursuits: making art and taking lives. Now deceased, he surfaces late in the manga and stands connected to both Taro Sakamoto and the…

Joichiro Kaji is a shy but gifted young assassin in Sakamoto Days who joins the JCC entrance exam as a special recommendation. Quiet and prone to overthinking, he hides an almost impossible sense of hearing that turns him into one of the…

Jo Shackles is the head guard of floor B1 in the JAA prison, a former special-forces killer once ranked closest to the Order. His warm-host act masks a volatile temper that flips to violence the instant his 'peaceful' floor is disrespected.

Jumbo Tanishi is a minor figure from the JCC Infiltration Arc of Sakamoto Days, a towering first-year student in the school's assassination track who becomes a brief example in a classroom combat demonstration.

Kamihate is the reclusive master sniper of Sakamoto Days, a former member of the Order and, by reputation, the deadliest marksman in JAA history. A face-hiding shut-in who treats his rifle as an extension of himself, he can end a life from…

Kanaguri is the film-obsessed assassin of Sakamoto Days, a celebrated director who founded Murder Films and pioneered the assassin-movie genre. A former Order member now embedded in Kei Uzuki's organization, he insists he is a filmmaker…

Kashima is a cyborg assassin in Sakamoto Days and the first of Kei Uzuki's followers to appear. A mannerly killer behind a reindeer mask, he drives the Lab Arc as its chief menace and channels a fixation on technology into a body crammed…

Kazuko is a minor antagonist in Sakamoto Days, an elderly woman who works as a barber. She appears only briefly, surfacing as a threat within a single early chapter of the manga, and little beyond her trade and advanced age is recorded…

Kei Uzuki, known as Slur or simply X, is the central antagonist of Sakamoto Days. A serial killer bent on toppling the JAA with his band of assassins, he once slaughtered a quarter of the entire assassin industry, leaving a bloody X at…

Kindaka, called the Steel Dragon, helped found the Order in Sakamoto Days and once mentored a young Sakamoto, Nagumo, Rion, and Uzuki. A clash with Uzuki dropped him into a coma lasting over eight years, and on waking he sides with…

Kippei Saionji is an assassin in Sakamoto Days recruited by Oki, alongside his younger twin sister, to rebuild the New Order. Outwardly meek yet ferociously strong, he serves as a supporting antagonist through the New JAA Arc.

Kobayashi, nicknamed Koba, is a poison-using hitman in Sakamoto Days who stands as a villain across Taro Sakamoto's Past Arc. Teamed with Higuchi and most likely hired by Sei Asaki, he kills silently with a deadly gas he produces himself.

Kondo works as an assassin for the Japanese Association of Assassins, better known as the JAA. A background figure introduced during the flashback to Sakamoto's student years, she supervises an escort assignment that first showcases how…

Konomi Amo is a child who surfaces only briefly during the arc that revisits Taro Sakamoto's earlier years. Her importance comes from her family, since she is the young daughter of the man who chairs the JAA, placing her close to that…

Kumanomi is an assassin allied with Slur and a central figure within X's Organization, the faction out to bring down the JAA. Raised in a failed orphanage scheme, she ranks among the story's major villains and looms large through the…

Kurii Ningu is a small-part player tied to the Amusement Park Arc, a cleaner who slips into a maintenance worker's clothes to get near his mark. His fate splits between the two versions of the story, ending in death in the manga while the…