Assassins in anime are never just “people who stab for a living.” They’re mentors, tragic heroes, chaos gremlins with sniper rifles, or high school teachers threatening to blow up the moon.
When fans vote on their favorite assassin anime, they’re really voting on the shows that blend stylish violence with big feelings and unforgettable characters.

This list of the 30 best assassin anime is based on fan rankings from Ranker’s
community-driven list “The Best Assassin Anime of All Time, Ranked By Fans,” updated in October 2025 and backed by more than 17,000 votes.
We’ve combined that fan wisdom with insights from anime-focused outlets and discussion boards to explain what makes each series worth your time.

How This Assassin Anime Ranking Was Built

Instead of one critic making a “definitive” list in a dark room with instant noodles, this ranking leans on fan voting from Ranker, where thousands of viewers upvote and downvote assassin anime based on how well they “get the job done” as killer-centric series.

We then cross-checked the titles with commentary and reviews from anime sites, blogs, and fan communities in the United States to highlight why fans love them: things like character depth, fight choreography, emotional gut-punches, and how cleverly each series uses the assassin theme.

The 30 Best Anime About Assassins, Ranked By Fans

1. Assassination Classroom

A yellow, tentacled super-being blows up most of the moon, then becomes a homeroom teacher and cheerfully tells his students they have one year to kill him before he destroys Earth.
Somehow this premise turns into a heartfelt story about growth, compassion, and second chances.
The assassination plots are wild, but it’s the emotional arcs and clever lessons that keep fans voting this one into the top spot.

2. Akame ga Kill!

On the surface, this is a dark fantasy about a rebel assassin group, Night Raid, taking down a corrupt empire.
Underneath the blood and flashy weaponry, it’s a brutal reminder that revolutions are messy, good people die, and plot armor is… optional.
Fans love its high stakes, memorable weapons, and the way it leans into moral gray zones.

3. Darker than Black

Set in a world reshaped by mysterious spatial anomalies, “Darker than Black” follows Hei, a masked contractor who kills with surgical precision while struggling with his fading humanity.
The show mixes noir aesthetics, spy intrigue, and supernatural powers, making its assassinations feel both stylish and deeply unsettling.
Fans praise its layered worldbuilding and morally ambiguous lead.

4. Phantom: Requiem for the Phantom

A kidnapped tourist loses his memories and is reshaped into “Zwei,” an elite assassin working under a legendary killer known as Phantom.
The series dives into brainwashing, identity, and what’s left of a person after they’ve been turned into a weapon.
It’s slow-burn, bleak, and beloved by fans who like their assassin stories psychological and tragic.

5. Black Cat

Train Heartnet starts as a cold-hearted hitman for a powerful organization, then catches feelings for normal people and begins questioning his life choices.
“Black Cat” blends gunfights, humor, and a redemption arc as Train goes from weapon to wandering do-gooder.
Fans enjoy the balance of fun banter, stylish action, and a surprisingly wholesome core.

6. Code:Breaker

A seemingly normal high school girl discovers a boy in her class moonlights as a supernatural assassin targeting corrupt criminals.
“Code:Breaker” runs on the tension between justice and vengeance, with its assassins serving as judge, jury, and very flashy executioner.
Fans appreciate its mix of school life, dark morality, and fire-powered showdowns.

7. Danganronpa: The Animation

Technically it’s about students locked in a death game, but the premise is a masterclass in premeditated murder.
Each “class trial” forces characters (and viewers) to think like assassinsplanning, misdirecting, and covering their tracks.
While it’s an adaptation of a game, fans still love its over-the-top kills, wild twists, and meta commentary on hope versus despair.

8. Future Diary

Thrust into a battle royale where each player’s diary predicts the future in a different way, contestants become assassins out of necessity.
The show is infamous for Yuno Gasai, the yandere queen who will happily kill for love and then bake you something adorable.
Fans flock to its chaotic energy and the way every character has a deadly gimmick.

9. Darker than Black: Gemini of the Meteor

This sequel shifts focus to a young girl whose life is destroyed by contractor conflicts, pulling her into Hei’s world of covert killings.
While more divisive than the original, it explores the fallout of living alongside supernatural assassins.
Fans who stick with it appreciate its character focus and expanded lore.

10. Riddle Story of Devil (Akuma no Riddle)

Imagine an all-girls class where almost every student is secretly an assassin assigned to kill one target.
The twist? One assassin decides to protect the girl instead of killing her, turning the show into a deadly yuri-tinged chess match.
Fans enjoy its mix of thriller elements, creative murder attempts, and evolving relationships.

11. Kill la Kill

This one is more about revenge and absurd fashion warfare, but assassination is baked into the premise:
Ryuko is essentially hunting her father’s killer through a fascist high school run like a military dictatorship.
It wins fan votes through insane animation, satire of power structures, and battles that feel like weaponized runway shows.

12. Gunslinger Girl

Government “rescues” terminally ill or injured girls, turns them into cybernetic child assassins, and assigns them handlers.
Beneath the quiet European scenery is a gut-wrenching story about exploited innocence, trauma, and the cost of turning children into weapons.
Fans praise its emotional restraint and ethical questions more than pure action.

13. Blade of the Immortal

Cursed with immortality until he kills 1,000 “evil” men, ronin Manji becomes bodyguard to a girl seeking revenge on a sword school that massacred her family.
It’s a bloody, philosophical road trip about vengeance, redemption, and what “evil” really means.
Fans love its brutal swordplay and morally tangled cast of assassins and targets.

14. Noir

Two womenone a professional assassin, the other an amnesiac with killer instinctsjoin forces to uncover a shared, shadowy past.
“Noir” is all atmosphere: guns, organ music, European backdrops, and a constant sense that someone’s about to be shot through stained glass.
Fans treasure its slow-burn mystery and “girls with guns” aesthetic.

15. Chaika: The Coffin Princess

Chaika roams the land carrying a coffin and hiring saboteurs to help her collect the scattered remains of a slain emperor.
While not a pure assassin show, it features plenty of targeted kills, political conspiracies, and morally gray mercenaries.
Fans enjoy its mix of adventure, magic, and unconventional “mission” structure.

16. Moribito: Guardian of the Spirit

Technically, bodyguard Balsa is trying to prevent assassination, not commit itbut assassins are everywhere in this show.
Hired to kill a prince believed to host a deadly spirit, they crash again and again against Balsa’s spear and stubborn moral compass.
Fans adore this series for its grounded combat, rich worldbuilding, and mature storytelling around political killings.

17. Gunslinger Girl: Il Teatrino

The follow-up to “Gunslinger Girl” continues the story of cybernetic child assassins and their handlers, focusing more on new relationships and internal politics.
While the animation shift is controversial, the emotional corekids trained to kill while craving affectionremains powerful.
Fans who connected to the first season often stick around for the added character depth here.

18. Lupin III: Island of Assassins

Lupin and his crew of thieves get tangled up with a legendary guild of assassins on a deadly island.
The movie plays like a stylish heist colliding with a hitman convention, full of traps, duels, and professional killers with old grudges.
Fans enjoy seeing the iconic cast go toe-to-toe with some of the deadliest foes in the franchise.

19. Golgo 13: Queen Bee

Duke Togo, also known as Golgo 13, is the archetypal professional hitman: stoic, precise, and disturbingly efficient.
“Queen Bee” puts him up against a dangerous woman tied to U.S. politics, revolutions, and a web of betrayal.
Fans come for the old-school vibe, sniper set pieces, and cold-blooded professionalism.

20. Phantom – The Animation

This earlier adaptation of the same source material as “Phantom: Requiem for the Phantom” covers similar ground: brainwashed assassins, mafia machinations, and the slow breakdown of identity.
While less polished than the later TV series, it still appeals to fans who love grim crime stories and tragic killers.

21. Madlax

From the same creative minds behind “Noir,” “Madlax” ties together a legendary mercenary in a war-torn nation and a sheltered girl in a peaceful country.
Assassinations here are part of a much larger, mystical conspiracy.
Fans who like patient storytelling and Yuki Kajiura’s haunting music find this series especially rewarding.

22. 009-1

Mylene Hoffman is a cyborg spy in a Cold War that never ended, taking on covert missions involving infiltration, assassination, and double agents.
Think retro sci-fi Bond with more tactical gadgets and moral ambiguity.
Fans appreciate its throwback style and the way it uses espionage and assassination to comment on endless war.

23. City Hunter

Ryo Saeba is a “sweeper”a private detective and gun-for-hire who often ends up in assassination-adjacent work, from protecting targets to taking out criminals.
The series mixes slapstick comedy with moments of razor-sharp gunplay and surprisingly serious arcs.
Fans love the ‘80s charm, iconic leads, and cool action set pieces.

24. Black Jack 21

This sequel to “Black Jack” focuses more on conspiracies around secret medical experiments and shadowy organizations.
Assassins show up as enforcers and cleanup crews in a world where science and ethics collide.
Fans who enjoy Osamu Tezuka’s universe appreciate how the show uses hitmen to underline the stakes of its mysteries.

25. Coppelion

In a post-nuclear Tokyo, genetically engineered girls immune to radiation are sent in as a rescue unitbut their missions quickly brush up against cover-ups, mercenaries, and people willing to kill to protect secrets.
While marketed more as sci-fi, it includes targeted killings and military-style operations that fit the assassin vibe.
Fans like its eerie ruined-city aesthetic and ethical questions about engineered soldiers.

26. Coyote Ragtime Show

A band of space outlaws races a group of robotic maidswho are also elite assassinsto a hidden treasure.
It’s gleefully pulpy: lots of gunfights, explosions, and “we probably shouldn’t survive this” moments.
Fans who enjoy old-school space anime appreciate its chaotic energy and assassin-versus-pirate showdowns.

27. Kill Me Baby

What if your classmate is an assassin, but the show is mostly about bad jokes and slice-of-life gags?
“Kill Me Baby” turns the hitwoman concept into an excuse for comedic fails, awkward friendships, and occasional bursts of absurd violence.
Fans who want the assassin trope played for laughs instead of angst flock to this one.

28. Koroshiya-san

The titular hitman will “kill” anything he’s hired to deal with: homework, chores, everyday annoyances, and yes, actual targets.
This short-format comedy reimagines the deadliest assassin as a hyper-literal problem solver.
Fans enjoy its bite-sized parody of hitman seriousness and its “assassinating daily life tasks” gag.

29. Knight Hunters Eternity (Weiß Kreuz Glühen)

A team of pretty-boy florists spends their nights as vigilante assassins eliminating abusers, traffickers, and criminals the law won’t touch.
The series leans into drama, angst, and stylish missions, while exploring what round-the-clock killing does to your psyche.
Fans of ‘90s and early-2000s anime aesthetics consider it a cult favorite.

30. Under Ninja

Set in modern Japan, “Under Ninja” imagines a secret ninja organization still operating below the surface of everyday life.
A down-on-his-luck young man is drafted into missions that involve surveillance, infiltration, and offing targets with low-budget resources.
Fans enjoy its dark humor and the way it pokes fun at both assassin and ninja tropes.

Why Assassin Anime Hits So Hard

Assassin anime works because it turns every choice into a life-or-death decision.
When killing is a job, things like loyalty, guilt, and “doing the right thing” get messy fast.
Shows on this list constantly ask: Who deserves to die? Who decides that? And what happens to people who live in that moral pressure cooker?

From the classroom chaos of “Assassination Classroom” to the political conspiracies in “Darker than Black” and the emotional wreckage of “Gunslinger Girl,”
these series don’t just show stylish killsthey show the emotional shrapnel that lingers afterward.

Fan Experiences & Tips for Watching Assassin Anime (Bonus Section)

If you ask long-time anime fans how they got hooked on assassin stories, you’ll hear surprisingly similar answers:
“I came for the cool fights… and stayed because I suddenly cared way too much about a guy with a tragic backstory and a gun.”
Assassin anime often becomes a gateway into darker, more mature storytelling, especially for viewers who started with lighter shounen or rom-com titles.

One common fan experience is the emotional whiplash of shows like “Akame ga Kill!” or “Phantom: Requiem for the Phantom.”
You press play expecting cathartic violence and slick action sequences.
A few episodes later, you realize you’ve accidentally signed up for a semester-long class in “The Economics of Suffering and Consequences.”
People you like die. Characters make impossible choices. And you’re left staring at the end credits rethinking your life.

Fans also talk a lot about the “moral hangover” that comes with binge-watching assassin anime.
When every episode ends with someone getting sniped, stabbed, or outmaneuvered, it’s easy to start seeing every character as either a target or a threat.
Many viewers recommend mixing heavier series with something lighterwatching “Kill Me Baby” or a slice-of-life show alongside “Darker than Black” or “Gunslinger Girl” to balance out the emotional load.

Another big part of the experience is community discussion.
Assassin anime invites debate: Was that assassination justified? Did the main character go too far?
Who actually counts as an “assassin” in shows where everyone has blood on their hands?
Online, fans trade favorite episodes, argue over which missions were the smartest or most brutal, and recommend “starter packs” to newcomersoften beginning with “Assassination Classroom” because it’s surprisingly accessible despite the premise.

The way people watch also shapes their experience.
Some fans swear by binge-watching, especially for twisty shows like “Future Diary” or “Riddle Story of Devil,” where the tension builds better over long sessions.
Others prefer weekly pacing, using breaks to theorize about who will die next, which alliances will crumble, and which character is secretly ten times more dangerous than they appear.
Assassin anime rewards both styles, as long as you give yourself time to actually process the heavier themes.

Finally, fans often talk about how assassin anime can sharpen your appreciation for direction and choreography.
Once you’ve watched enough of these series, you start noticing how a good assassin scene is built: camera angles, timing, misdirection, and small character choices like hesitations or glances that reveal a killer’s state of mind.
Whether it’s Hei vanishing into the night, Train casually dodging bullets, or a classroom of students coordinating to kill their teacher, the best scenes feel like puzzles designed to be solved in motion.

If you’re diving into this list for the first time, the best “experience build” is simple:
start with something balanced and emotional like “Assassination Classroom,”
follow it with a darker, more grounded series like “Phantom” or “Gunslinger Girl,”
and then cleanse your palate with a comedic or over-the-top entry like “Kill Me Baby” or “Under Ninja.”
You’ll get the full range of what assassin anime can offerheart, horror, humor, and a lot of characters who really need therapy.

Conclusion

From elite hitmen and tragic child soldiers to clueless students learning how to kill their teacher, assassin anime covers a huge emotional and stylistic range.
These 30 shows stand out because fans didn’t just enjoy the actionthey cared about the people behind the triggers, blades, and contracts.

Whether you’re here for cathartic revenge stories, tense political conspiracies, or dark comedy with silencers,
this fan-ranked list gives you a roadmap to the best assassin-centric anime out there.
Just remember: in this subgenre, no one is truly safeexcept maybe the character who looks the least dangerous. That one’s usually terrifying.

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