Characters: World Trigger

The characters of World Trigger.

For its relatively short length, the series has already become a case of Loads and Loads of Characters, so expect this page to be split up over time. For now, it most of all Needs Wiki Magic Love.

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    Main characters 

Mikumo Unit / Tamakoma-2

The main characters of the series form a squad with Osamu Mikumo as their leader. They are currently part of the Tamakoma Branch.

Osamu Mikumo

B-Class, Shooter
15 Years
Voiced by: Yuki Kaji

One of the main characters of the series with most of the story being seen from his perspective. Begins as a C-Rank agent but quickly reaches B-Rank, mostly by (unwillingly) taking credit for the actions of the neighbor Yūma Kuga. Joins the Tamakoma Branch later on and forms a squad with his friends Yūma and Chika with him as the leader.

  • Awesome by Analysis: He is great at analyzing the situation and creating new strategies on the fly with what limited resources he has.
  • BFS: His Raygust-trigger, which is basically a huge energy-sword that can double as a shield and thruster, and even a combat knife (though this function has only been shown by Reiji).
  • Classical Antihero: He has low self-confidence, and isn't the best of fighters, but is willing to fight for what he thinks is right nonetheless. This leads to people, principally Yūma, Chika and maybe Kitora and Kazama, have good expectations on him.
  • Humble Hero: Humble to the point of being a doormat.
  • Luckily My Shield Will Protect Me: A secondary function of the Raygust is an energy shield. He also has the regular Shield Trigger.
  • Memetic Badass: Along with the rest of his team Osamu becomes this In-Universe during the C-Rank wars after managing to draw with Kazama during their duel. Of course Osamu being Osamu is naturally embarrassed by this praise especially since the story is a bit distorted. After his loss against Midorikawa and revealing the truth of the duel to the other C-Rank trainees his reputation as this stops... only for him to get a new one since Yuma calls Osamu his leader and he is appearently important enough to be in a private meeting with Kido and the other higher-ups of Border.
  • Morph Weapon: Raygust.
  • Nice Guy: Extremely polite and helpful, even towards jerks and people he barely knows, not because he is naive but because he wants to do what is right.
  • Overshadowed by Awesome: Compared to the skilled and experienced Yūma and Chika's gigantic Trion-supply he is just a rather mediocre agent who can only survive by relying on his skills and wits.
  • The Scapegoat: Invoked but subverted. Eizo Netsuki tried to shift blame for the 32 C-class agents being kidnapped to Osamu, but because of Katsumi Karasawa, Osamu not only had the opportunity to stand for himself, he turns the situation around and says he will save the kidnapped agents himself, which earns a very favourable reaction from the public.
  • Smart People Wear Glasses: One of the few people wearing glasses and definitely smart.
  • Sword and Gun: Being a Shooter he mostly specializes on using his Asteroid (in cube form), though he still uses his Raygust for close-combat and defensive purposes.
  • Specs of Awesome: He has his moments.
  • Took a Level in Badass: He is definitely one of the characters who has the most catching up to do, so this is pretty common.
  • Weak, but Skilled: The major difference in Osamu's fighting style in comparison to Yuma and Chika is that unlike them he has a below average amount of Trion compared to normal soldiers. Osamu makes up for that by his creative manipulation of Trion, his willingness to receive disabling injuries and also conserving his power to make critical shots. As Kurasama points out Osamu is weak but not stupid.

Yūma Kuga

B-Class, Attacker
15 Years
Voiced by: Tomo Muranaka

The main character, a humanoid neighbor from an unknown world who illegally came to Earth and joined the same class as Osamu.

  • The Ace: Yuma is definately this not just amongst his own team but to other agents of Border as well. Not only is he in possession of a Black Trigger, and has full mastery over it, when he joins the ranks of Border he willignly switches to using a weaker Trigger and still kicks an insane amount of ass. Not only that but thanks to his years of combat experience in the Neighbourhood he has a brilliant strategically mind for battles. Finally, if that wasn't enough, during the second Neighbour Invasion he manages to defeat Viza in his normal Trion body and use the last of his power to finish of Hairein. By the time of the B-Rank Wars he is officially considered to be The Ace of Tamakoma-2.
  • Adaptive Armor: His Black Trigger.
  • Armed Legs: Can power up his legs with his black Trigger.
  • Almighty Janitor: Starts as a C-Rank trainee after joining Border, despite being easily A-Rank in skill and S-Rank when using his Black Trigger. He still insists on going the normal through the rank-wars to earn a solid reputation as a neighbor in Border.
  • Ambiguously Human: Looks like a human but is a humanoid neighbor in truth. The white hair and red eyes might give a hint.
  • Badass Adorable: A rather cute looking young boy on the outside, an experienced and deadly soldier on the inside.
  • Beware the Silly Ones: He acts like a goofball most of the time but will instantly switch back to his brutally efficient badass self when necessary. And he will utterly kick your ass if you ever harm or ridicule his friends.
  • Dark Is Not Evil: His black armor when using his Trigger.
  • Death by Origin Story: Got killed by a mysterious foe before the series began, though his father sacrificed himself to create a Black Trigger that keeps Yūma alive.
  • Dual Wielding: Prefers using two Scorpions when not using his Black Trigger.
  • Heroic Albino: White hair, red eyes, definitely heroic.
  • Living Lie Detector: His side-effect, inherited from his father due to his Black Trigger, lets him notice if someone lies.
  • Living on Borrowed Time: While he can survive with his Trion-body thanks to his Black Trigger, his real body still slowly decays over time. Once it is gone, the Trion-body will vanish as well.
  • Magic Enhancement: An ability of his Black Trigger. Can be used both on himself and other Trion-users.
  • Memetic Badass: In-Universe. Along with the rest of his team Yuma becomes this during the C-Rank wars, firstly for managing to destroy the simulated Trion soldier in combat traning in 0.4 seconds, and secondly for Curb Stomping Midorikawa 8-2.
  • Morph Weapon: Both his black trigger and the Scorpion.
  • Older Than They Look: Since his Trion-Body doesn't show signs of aging.
  • Pint-Sized Powerhouse: Because his growth has stopped since his death. Not a problem, since Trion-bodies don't rely on physical body mass anyway.
  • Power Copying: His Black Trigger can analyse and copy Triggers that are used against him.
  • Power Fist: His standard attacks with the black trigger involve punching things with a powered fist.
  • Skilled, but Na´ve: While he is a very skilled individual, he has little knowledge on how Society works in our world.
  • Spring Jump: Picks up the Grasshopper after reaching B-Rank, which allows him to jump in midair.
  • Swiss Army Weapon: Just look at all the abilities of his Black Trigger listed here...
  • Trick Bullet: Can use special black Trion projectiles that penetrate shields and slow their victim down with huge weight instead of causing damage. Copied this technique from Miwa.


Tropoi Autonomous Trion Soldier
Voiced by: Hideyuki Tanaka

An intelligent Trion Soldier that serves as a guardian and guide to Yūma Kuga.

  • Heroic Sacrifice: A non fatal version of this happens during the end of the Invasion Arc. Replica is sliced in half by Moira's attack and is left heavily damaged knowing that the time it would take in order to open the door to Border HQ would be to long he has Osamu throw him into the portal linking the Neighbours ship to the outside world in order to force the ship to leave the planet. This forces the Neighbours to leave without acquiring Chika but because of his heavily damaged state he can't fly away and is stuck in the Neighbours ship as it teleports away.
  • Non-Human Sidekick: To Yūma Kuga. He acts as his guardian and also gives him certain powers.
  • The Smart Guy: Thanks to his travels with Yuma and his father Replica has extensive knowledge, not just of the Neighbour Worlds, but triggers too. Not only is he the A.I. that controls Yuma's Black Trigger but his extensive knowledge of the Neighbourhood allows him to update Border's systems, create a replica Rabbit after analysing one of the original models, and, with Osamu's help is ultimately the one who forces the Aftokrator neighbours to retreat.

Chika Amatori

B-Class, Sniper
13 Years
Voiced by: Nao Tamura

The younger sister of Osamu's tutor. He himself became her tutor, after her brother disappeared. Neighbors have been frequently targeting her since she was little because she has the largest Trion-supply ever recorded.

She joins Border as a sniper early in the series to learn how to protect herself and to have a chance to search for her missing brother and friend. After the invasion she got a promotion to B-Class, partially because she is considered a valuable asset due to her enormous Trion.

  • Badass Adorable: She's the cutest little kid you could think of... and also able to fire an almost unstoppable Death Ray.
  • Blessed with Suck: Chika is in possession of an insanely high amount of Trion which even for advanced border agents is considered abnormal. Unfortunately this same power makes her a target for Trion soldiers, her brother and friend both end up getting kidnapped trying to help her, and during the Invasion Arc she is turned into a Trion Cube and almost captured by the Humanoid Neighbours. Girls got it rough to say the least.
  • The Cutie: A genuinely sweet kid with an oversized sniper rifle.
  • Does Not Know His Own Strength: Even after joining Border and starting her Sniper training, she still doesn't know half the extent of her Trion prowess.
  • Doom Magnet: Her enormous Trion attracts a lot of strong neighbors that try to capture her and are a danger to everyone around her. She has become traumatized after her brother and her best friend were captured by Neighbors.
  • Friendly Sniper: For all her destructive potential she is the sweetest girl you could think of.
  • Idiot Hair: In the middle of her head.
  • In-Series Nickname: Called "Chikako" by Izuho.
    • She is also called Tamakoma's Trion Monster after she blows a hole in the wall of Border HQ using an Ibis.
  • Long-Range Fighter: As a sniper she at least SHOULD be this, sadly she often finds herself to be rather close to the action.
  • Memetic Badass: In-Universe along with the rest of her team. See the "Tamakoma's Trion Monster" thing above.
  • Pint-Sized Powerhouse: Small stature, ridiculous amount of Trion.
  • Tareme Eyes: A trait shared by none in the manga.
  • Unskilled, but Strong: HUGE Trion-supply, but still an inexperienced trainee and not the best shot even among the new snipers.


Yūichi Jin

S-Rank, Attacker
19 Years
Voiced by: Yuuichi Nakamura

The self-proclaimed "Elite-agent" of the Tamakoma Branch. He wields the "Fujin" ("Wind Blade)", one of the two Black Trigger in all of Border, and possesses a Side Effect which grants him limited insight into peoples future.

  • The Ace: Never anything less than confident, being immensely skilled and able to see the future to some degree
  • The Chessmaster: Partially thanks to his side effect, partially thanks to his own wits, Jin is able to see possible futures and attempt to steer events towards the most ideal one. During the large scale invasion arc, the Aftokrator even note that someone was pulling the strings the entire time.
  • Combat Clairvoyance: His side-effect allows him to see the immediate future, which includes most incoming attacks.
  • Cool Shades: His signature accessories.
  • Guile Hero: By effectively utilising his side effect and his wits, he can manipulate events to achieve the best outcome he could.
    • For example, negotiating with Commander Kido to recognise Yuma as a member of Border despite the fact he is a neighbour. He did this by giving up his own Black Trigger, after he beat the people sent to kill Yuma and take Yuma's Black Trigger using it, making his own Black Trigger look more valuable. He also warned Commander Kido against escalating the conflict by telling him what would happen if he did, forcing Kido to back down. He also tells Kido that Yuma and his other juniors will be helpful for Kido's true objective, which ultimately convinces him to accept Jin's proposal and ending the conflict.
    • During the Large-Scale Invasion arc, he told his allies where to be and what to do before hand, based on what his side-effect tells him. Thanks to that, he allowed Border to achieve one of best possible outcomes, even if it wasn't THE best outcome.
  • Morph Weapon: The Scorpion Trigger, which was created by himself.
  • Razor Wind: His Black Trigger "Wind Blade" is a sword that can shoot these from all connected surfaces it touches. Though it is debatable if it really is "wind" or just extending energy blades.
  • Sunglasses at Night: Never seen without them, no matter the time of day.
  • Trademark Favorite Food: His Bonchiage (fried soy sauce rice crackers). He's hardly ever seen without them. Anime filler even added a scene where his room is full of boxes of the stuff.

    Tamakoma Branch 


Takumi Rindō

Tamakoma Branch Chief
Voiced by: Keiji Fujiwara


The only known unit of Tamakoma Branch prior to the recruitment of Osamu, Yūma and Chika. They are considered to be the strongest squad in all of Border.

Reiji Kizaki

A-Class, Allrounder
21 Years
Voiced by: Tomoaki Maeno

Kirie Konami

A-Class, Allrounder
17 Years
Voiced by: Rie Kugimiya

  • Action Girl: One of the most skilled agents in all of border.
  • An Axe to Grind: The Sōgetsu, two hatchets which become a huge two-handed battle axe, after combining those.
  • Dual Wielding: The Sōgetsu, in their standard form.
  • Hair Wings: Part of her hair forms a wing even in her trion form, through it doesnt serve any purpose and its just decorative.
  • Man Bites Man: A comedic variant, in which she is fond of biting Osamu head when Kyosuke pranks her.
  • Morph Weapon: The Sōgetsu.
  • Power Makes Your Hair Grow: Inverted. Her hair gets short while in her Trion Body form.
  • Skilled, but Na´ve: Played with. Despite being an experienced and skilled member of Border, she'll believe in almost anything one tells her, and thus she is frequently made fun of.
  • Super Gullible: She believes anything other people tell her, no matter how ridiculous. This includes believing Jin when he said Osamu, Chika and Yuma were his siblings when they don't look alike at all.
  • Tsundere: She shows a few signs that she might me.
    • She tries to cover up her shyness with strength, as shown when Kyōsuke told her Osamu had called her pretty.
      • She becomes very violent when Kyōsuke tells her he lied to her, though she discounts it on Osamu instead.

Kyōsuke Karasuma

A-Class, Allrounder
16 Years
Voiced by: Jun Fukuyama

  • Barrier Warrior: Seems to specialize in defensive Triggers like the 'Escudo'.
  • Bishie Sparkle: When outside of combat, he usually has this around his hair.
  • In Universe Nickname: "Scruffy Hottie".
  • In the Back: How he is defeated by Hairen and Moira.
  • The Mentor: For Osamu.
  • The Stoic: Just like Reiji, never loses his calm or patience.
  • Super Mode: He can use something called Geist to overclock his Trion and apply additional power to his attributes though his Trion-body will destroy itself after 3 minutes which makes it akin to a temporary Deadly Upgrade.
  • Super Speed: He becomes insanely fast when using his Geist for Blade Shift or Mobility Shift.
  • Sword and Gun: Assault Rifle Gunner-Trigger and a Kogetsu.

Shiori Usami

A-Class, Operator
17 Years
Voiced by: ???

The Main Operator of the Tamakoma Branch. Formerly the operator of the Kazama Unit in the Main Branch.

Yōtarō Rindō

5 Years
Voiced by: ???



    Main Branch / Shinoda Faction 


Masafumi Shinoda

Commander of the Self-Defense Unit
25 Years
Voiced by: Takeshi Kusao

  • Asskicking Equals Authority: Is said to be the strongest agent in border using a normal trigger and can boast a lot of fighting experience, seeing that he knows Yūma's father.
  • Bad Ass Longcoat: When in Trigger Mode.
  • Master Swordsman: Fought Enedra's Black Trigger while successfully attacking his hidden weak point and effortlessly dodging all of his attacks. He also was Tachikawa's mentor and is still considered to be the strongest agent in border (excluding those with a Black Trigger).
  • Morph Weapon: Using the trigger "Senkū" (Whirlwind) that can extend it's blade.
  • Reasonable Authority Figure: Is tolerant of neighbors with friendly intentions and will not support destructive infighting in the power struggle between the Kido Faction and Tamakoma.

Kyōko Sawamura

General Manager Counsellor
25 Years
Voiced by: Houko Kuwashima

Arashiyama Unit

An A-Rank unit led by Jun Arashiyama. It is ranked #5 amongst all A-Rank units in Border. The entire unit is called "The Face of Border" and is often used for public relations work.

  • Underestimating Badassery: Certain wannabe experts (like the 3 idiot rookies) think of the unit as a mere mascot team without any actual skill. Of course they are dead-wrong.

Jun Arashiyama

19 Years
A-Class, Allrounder
Voiced by: Nobuhiko Okamoto

The leader of the Arashiyama Unit and an All-Rounder.

  • The Face: His entire unit is called "The Face of Border" because of their spotless reputation and idol-like status, but the trope fits him best.
  • Morph Weapon: Scorpion.
  • Nice Guy: Always polite and positive.
  • Teleporters and Transporters: Very fond of using Teleportation-Triggers to outmaneuver his opponents.

Ai Kitora

A-Class, Allrounder
15 Years
Voiced by: Kana Hanazawa

An All-Rounder (uses Attacker and Gunner Triggers in combination) of the Arashiyama Unit.

She is considered to be one of the biggest prodigy Border ever had, reaching A-Rank at a very young level.

  • Action Girl: One of the few female A-Rank agents and a match for almost all of her male colleagues.
  • An Armand A Leg: Not unusual for this series, though Kitora seems to be especially prone to losing legs in combat, sometimes even cutting it off herself.
  • Armed Legs: Had to use her Scorpion as a replacement leg in one battle and has seemingly taken a liking to it.
  • Awesome by Analysis: Although she's famous mainly for being highly skilled, like Osamu, she's capable of overcoming her weakness with strategy.
  • Boisterous Bruiser: She seems akin to this.
  • Child Prodigy: Reached A-Rank at a really young age.
  • Grappling-Hook Pistol: A secondary function of her pistol. A trigger called "Spider".
  • Jerk with a Heart of Gold: Although she at first seems to be an arrogant and cold girl, she turns out to be a very humble and kind girl.
  • Kuudere: She seems self-obsessed, gruff and arrogant at first glance, but has a huge dedication to her duty of protection people and shows quite some interest towards Osamu's growth.
  • Morph Weapon: Scorpion.
  • Sempai/Kohai: Where she is the Kohai and Karasuma the Sempai.
  • Sword and Gun: Often uses a pistol-shaped Trigger alongside her Scorpion.
  • Waif-Fu: Justified though, as she is using a Trion-Body.

Mitsuru Tokieda

A-Class, Allrounder
16 Years
Voiced by: Yuuta Kasuya

The third member of the Arashiyama Unit. A rather quiet and reserved guy with a bowl cut.

  • Kindhearted Cat Lover: According to the official World Trigger twitter, he owns two cats. A dark tiger cat named Arthur, and a white cat with black spots, Tomio.
  • Morph Weapon: Scorpion.
  • The Stoic: Remains mostly quiet unless there is anything important to say. In which case he will cut straight to the point.

Ken Satori

A-Class, Sniper
16 Years
Voiced by: ???

The good-natured sniper of the Arashiyama Unit. He is ranked 4th place amongst all snipers of border.

  • Catchphrase: "Did you see my twin rifle sniping?", which he saids after every fight in which he is involved.
  • Crouching Moron, Hidden Badass: He is quite goofy outside of combat, but one of the best snipers in all of border and able to land two critical shots at once.
  • Friendly Sniper: Good-natured and cheerful, delivering each shot with a smile.
  • Guns Akimbo: With sniper rifles no less!
  • Long-Range Fighter: Sniper.

Haruka Ayatsuji

A-Class, Operator
17 Years
Voiced by: Shiori Mikami

    Main Branch / Kido Faction 


Masamune Kido

Border Headquarters Commander-in-Chief
43 Years
Voiced by: ???

Motokichi Kinuta

Headquarters Development Chief
49 Years
Voiced by: ???

  • Friend to All Children: He seems like a jerk, but he has a soft spot for young children because of his daughter.
  • Gonk: Has a rather... Easily recognizable face.

Eizo Netsuki

Media Countermeasures Chief
39 Years
Voiced by: ???

  • Gag Nose: He has a... Very noticeable nose.
  • Nervous Wreck: He has his moments. Frequently. In an emergency, he is shown to be the first one to panic.

Katsumi Karasawa

Foreign Affairs Operations Manager
33 Years
Voiced by: ???

  • Catch Phrase: "I used to play Rubgy when I was younger." is often said by him to explain something about himself.
  • The Stoic: He doesn't show interest with the Power Struggle between Kido and Rindō factions.

Tachikawa Unit

An A-Rank unit led by Kei Tachikawa. It is ranked #1 amongst all A-Rank units in Border.

Kei Tachikawa

A-Class, Attacker
20 Years
Voiced by: ???

Leader of the Tachikawa Unit, part of the Expedition Force and both the #1 attacker and overall agent of the entire Kido Faction. Has a long-standing rivalry with Jin.

  • The Ace: Number one attacker from Border, not counting Amo and Shinoda.
  • Bad Ass Longcoat: A long, black one to got with all the badass.
  • Blood Knight: Really interested in defeating new oponents, even Black Trigger users.
  • Dual Wielding: Sometimes uses two Kogetsus at the same time.
  • Exotic Eye Designs: His eyes look... off. They resemble a fly eyes.
  • Friendly Rivalry: With Jin. They actually get along pretty well.
  • Master Swordsman: Superior even to Jin in pure swordmanship.
  • Morph Weapon: Using the trigger "Senkū" (Whirlwind) that can extend it's blade.
  • Not So Different: For all his (friendly) rivalty with Jin, Miwa notes both of them are very similar.
  • Perma Stubble: Always sports a slight stubble.
  • The Power Of Feelings: Averted. He explicity says that if feelings were involved in a fight, he wouldnt be the number one.
  • The Rival: A longstanding one to Jin at least till the latter received a Black Trigger and reached S-Rank.

Kōhei Izumi

A-Class, Shooter
17 Years
Voiced by: ???

A blonde-haired shooter of the Tachikawa Unit.

Seems to have little qualms about causing large collateral damage with his triggers.

  • Armor-Piercing Attack: The Gimlet-projectiles (a combination of two Asteroids) are specifically designed to damage heavy armor.
  • Beam Spam: When using the Hound or the Viper.
  • Guns Akimbo: Not so much guns as "projectile-firing cubes" but you get the idea.
  • The Gunslinger: Can use different types of bullets and even fusions for different attacks.
  • Homing Projectile: The Hound automatically homes onto targets while the Viper (and thus also the Tomahawk) can be manually guided.
  • In Universe Nickname: "Bullet Fool", courtesy of Yoneya.
  • Mix-and-Match Weapon: Can merge 2 weapons to create a mixture (Viper+Meteor=Tomahawk) or a more concentrated version (2xAsteroid=Gimlet) of it.
  • More Dakka: His modus operandi.
  • The Nicknamer: Calls Yoneya "Spear Geek".
  • Long-Range Fighter: He only uses ranged Shooter-Triggers.
  • Vitriolic Best Buds: Seems to be this to Yoneya of the Miwa Unit, who he "affectionately" calls "Spear Geek".

Takeru Yuiga

A-Class, Gunner
16 Years
Voiced by: ???

The thus far unseen Gunner of the Tachikawa Unit.

  • The Ghost: Mentioned, but never seen so far.

Yuu Kunichika

A-Class, Operator
17 Years
Voiced by: ???

The Operator of the Tachikawa Unit. Has an impressive collection of video game consoles in her room.

  • Messy Hair: She has really messy hair.
  • Nerd: As evidenced by her habit of collecting video game consoles.

Fuyushima Unit

An A-Rank unit led by Fuyushima. It is ranked #2 amongst all A-Rank units in Border.

Shinji Fuyushima

A-Class, Spec Op Trapper
29 Years
Voiced by: ???

The leader of the Fuyushima Unit.

  • The Ghost: Mentioned, but not seen until Chapter 73.
  • Trap Master: He is a "Trapper", an as-of-yet unknown Border position. As of right now the only known ability he's shown is his ability to tactically teleport allies at will.

Isami Tōma

A-Class, Sniper
18 Years
Voiced by: ???

A sniper of the Fuyushima Unit. He is part of the Expedition Force and ranked #1 amongst all snipers of Border.

He accompanies the Miwa, Kazama and Tachikawa Units in their mission to capture Yūma's Black Trigger.

Kazama Unit

An A-Rank unit led by Sōya Kazama. It is ranked #3 amongst all A-Rank units in Border and is specialized in stealth and melee combat.

  • Dual Wielding: All members of the unit are dual-wielding two Scorpions on occasion.
  • Invisibility: All members of the unit use the Chameleon Optional Trigger, which allows temporary invisibility.
  • Morph Weapon: All members of the unit are using the Scorpion.

Sōya Kazama

A-Class, Attacker
21 Years

The leader of the Kazama Unit, part of the Expedition Force and #2 ranked Attacker in all of border.

  • Pint-Sized Powerhouse: Pretty small, even compared to younger agents, but still the second most powerful A-Rank attacker.
    • Ironically, he's the oldest member of his team, being 5 years older than his team mates (except for Shiori, who is 4 years younger than him). The only one in the group shorter than him is Kaho.
  • The Stoic: Has a calm demeanor and rarely lets his emotions openly show.

Shirō Kikuchihara

A-Class, Attacker
16 Years
Voiced by: ???

A long-haired attacker of the Kazama Unit.

Ryō Utagawa

A-Class, Allrounder
16 Years
Voiced by: ???

An allrounder of the Kazama Unit.

Kaho Mikami

A-Class, Operator
16 Years
Voiced by: ???

The operator of the Kazama Unit.

Kusakabe Unit

An A-Rank unit led by Kusakabe. It is ranked #4 amongst all A-Rank units in Border.


A-Class, ???
Voiced by: ???

The thus far unseen leader of the Kusakabe Unit.

  • The Ghost: Mentioned, but never seen so far.

Shun Midorikawa

A-Class, Attacker
14 Years
Voiced by: ???

A young prodigy of border who holds the record in the enlistment test. Until Yūma broke it at least.

  • Attention Whore: Tries everything to get the attention of the older A-Rank agents and to build up a strong reputation as an A-Rank rookie.
  • Bitch in Sheep's Clothing: Likes to wear a mask of friendly curiosity to hide selfish motives.
  • The Cameo: Has a brief appearance in Chapter 10, greeting Jin in Border's base.
    • Ascended Extra: In the anime (Episode 5), this cameo is extended, and he directly talks to Jin, even being called by his name.
  • Character Development: Learns a lesson in humility from being beaten by Yuma and already profits from it in his next fight.
  • Child Prodigy: Reached A-Rank at a very young age and even broke Kitora's record at the entrance-test.
  • Keet: Though with a large streak of jerk.
  • Morph Weapon: Scorpion.
  • The Nicknamer: Calling Yūma "Midget-senpai", Yoneya "Yoneyan", and Izumi "Izumin"; and obviously, calling Jin "Jin-San".
  • Sempai/Kohai: He is always trying to call the attention of Jin, who saved his life long ago (which was his reason to join Border).
  • Spring Jump: His trigger Grasshopper, which creates multiple screens of light which function as springs.
  • The Rival: After his humiliating defeat in the hands of Yūma, they became friendly rivals.

Kako Unit

An A-Rank unit led by Shūji Miwa. It is ranked #6 amongst all A-Rank units in Border.

  • Amazon Brigade: An all-female unit and one of the best amongst Border.

Nozomi Kako

A-Class, Shooter
20 Years
Voiced by: ???

The leader of the Kako Unit.

  • Action Girl: One of the strongest women in Border.
  • Beauty Mark: Under the left side of her lips.
  • The Ghost: One of the eight candidates for the Fūjin mentioned by Jin in Chapter 43.
  • The Gunslinger: Probably one of the best among Border.
  • Tsurime Eyes: A shared trait of both her and Futaba.

Futaba Kuroe

A-Class, Attacker
13 Years
Voiced by: ???

Another child prodigy. Nothing is known about him or her.

Miwa Unit

An A-Rank unit led by Shūji Miwa. It is ranked #7 amongst all A-Rank units in Border.

Shūji Miwa

A-Class, Allrounder
17 Years
Voiced by: Masakazu Morita

The leader of the Miwa unit and an attacker.

He harbors a strong hatred for neighbors because his older sister was killed by them. He is Jin's favorite candidate for a new user of his former black trigger, the "Wind Blade".

  • Anti-Hero: He is willing to fight even supposed allies to get his revenge on all Neighbors alike. This seems to start gradually changing as everyone around him start accepting Yūma as an ally and member of Border and he is forced to, too.
  • Abnormal Ammo: Has a trigger that turns his bullets into weights that slow down the enemy.
  • Badass: Say what you will about the guy but there's no doubt that he is definitely this. While he gets some pretty Badass points during the first couple arcs in the series (especially since he's the first character to give Yuma a hard time during a fight) its his fight with Hairein that really shows he's not someone to screw with. Firstly he manages to put Hairein on the ropes thanks to his quick attacks and reflexes, secondly when Hairein tries to use Moira's portals to sneak attack him he whips out his gun, fires some tracking shots through said portal and uses them to hit both of Hairein and Moira and finally he whips out "Wind Blade" and, with Replica's help, dismembles Hairein's body allowing Yuma to finish him off.
  • Cynicism Catalyst: His older sister was killed by neighbors, which fuels his desire to kill them.
  • Exhausted Eyebags: After the Black Trigger retrieval arc, mostly due to Yuma being admitted into Border.
  • Fantastic Racism: Has an immense hatred against neighbours.
  • I Was Just Passing Through: Saves Osamu as Jin asked him to do, but in his words only because he wants to defeat Hairein.
  • Revenge Before Reason: His hatred for neighbors really clouds his reasoning at times.
  • Scarf of Asskicking: Perhaps subverted, as he wears it while he isnt on his fighting form.
  • Shout-Out: His badges feature Rilienthal Hino, Gomuzō and Super Alien Cat, from the creator's previous work Manga
  • Sword and Gun: Handgun-shaped Gunner-Trigger and a Kogetsu.
  • Trick Bullet: Uses special black Trion projectiles that penetrate shields and slow their victim down with huge weight instead of causing damage.

Yōsuke Yoneya

A-Class, Attacker
17 Years
Voiced by: Daisuke Kishio

An attacker of the Miwa Unit.

He is a rather good-natured member of border, especially compared to the rest of his squad. He has no special resentment against Yūma or Neighbors in general and just likes to do his job and have a good fight.

  • Blade on a Stick: Uses his Kogetsu and Scorpion in combination to form a spear that can change it's size and point.
  • Blood Knight: A friendly variant, but he is also always looking for a fight.
  • Boisterous Bruiser: Always searches for a good fight against strong opponents.
  • Book Dumb: Has bad grades and doesn't seem very conventionally smart, but can be very shrewd and insightful at least what combat is concerned.
  • Catch Phrase: "Or so you think." which he says at least once in almost every fight.
  • In Universe Nickname: "Spear Geek", courtesy of Izumi.
  • Morph Weapon: The Scorpion-part of his spear.
  • The Nicknamer: Calls Izumi "Bullet Fool".
  • The Power of Friendship: Or rather the power of teamworking, as he says when he defeats Lamvalein thanks to a combined shield he and other Border agents do that allows him to pierce him with his spear.
  • Vitriolic Best Buds: Seems to be this to Izumi of the Tachikawa Unit, who he "affectionately" calls "Bullet Fool".

Tōru Narasaka

A-Class, Sniper
17 Years
Voiced by: Yusei Oda

A Sniper of the Miwa Unit. Ranked second place among all snipers of border and achieved a perfect score in training.

Harbors some resentment against Neighbors because they destroyed his house.

Shōhei Kodera

A-Class, Sniper
16 Years
Voiced by: ???

A Sniper of the Miwa Unit. Ranked third place among all snipers of border.

Harbors some resentment against Neighbors because they destroyed his house.

Ren Tsukimi

A-Class, Operator
19 Years
Voiced by: Chihiro Ikki

The Operator of Miwa Unit. She and Kei are childhood friends.

Other Members

Members who are operating solo or whose unit or branch is unknown so far.

Tsukihiko Amō

S-Rank, ???
16 Years
Voiced by: ???

An S-Rank agent of Border who is operating solo.

Not much is known about him so far, aside from him regulary destroying the area he is fighting in.


Voiced by: ???

One of the eight candidates for Fūjin. In the Anime he was revealed to be the guy in glasses who greets Jin when he goes to Border HQ.

  • Ascended Extra: In the manga, the guy in glasses who greets Jin is unnamed, and he is mentioned by name by Jin as one of the candidates for the ownership of Fūjin. In the anime, they're both revealed to be the same person.
  • Shout-Out: He's based on a character from one of Ashihara's previous works, an Oneshot called Manga/Room303

    Main Branch / Unknown Faction 

Azuma Unit

An B-Rank unit led by Haruaki Azuma. It is ranked #6 amongst all B-Rank units in Border.

Haruaki Azuma

B-Class, Sniper
25 Years
Voiced by: ???

The leader of the Azuma Unit and a veteran Sniper of Border.

  • All There in the Manual: Additional material states that he was the first Sniper of border and the teacher of high-ranking agents like Tōma and Reiji.
  • BFG: Uses the heavy Ibis Sniper Trigger. Not that it helps against the Rabbits.
  • Long-Range Fighter: Sniper.

Noboru Koarai

B-Class, Attacker
16 Years
Voiced by: ???

Tsuneyuki Okudera

B-Class, Attacker
16 Years
Voiced by: ???

Mako Hitomi

B-Class, Operator
18 Years
Voiced by: ???

Kuruma Unit

An B-Rank unit led by Tatsuya Kuruma. It is ranked #8 amongst all B-Rank units in Border.

Tatsuya Kuruma

B-Class, Gunner
19 Years
Voiced by: ???

The leader of the Kuruma Unit.

  • Nervous Wreck: He's always sweating and nervous, even when not in immediate danger.

Kō Murakami

B-Class, Attacker
18 Years
Voiced by: ???

A strong agent who is ranked 4th of all attackers in Border, despite only being B-Rank.

Taichi Betsuyaku

B-Class, Sniper
17 Years
Voiced by: ???

Yuka Kon

B-Class, Operator
18 Years
Voiced by: ???

Suwa Unit

An B-Rank unit led by Kōtarō Suwa. It is ranked #10 amongst all B-Rank units in Border.

Kōtarō Suwa

B-Class, Gunner
21 Years
Voiced by: ???

The leader of the Suwa Unit.

Daichi Tsutsumi

B-Class, Gunner
20 Years
Voiced by: ???

Hisato Sasamori

B-Class, Attacker
16 Years
Voiced by: ???

Rui Osano

B-Class, Operator
17 Years
Voiced by: ???

Arafune Unit

An B-Rank unit led by Tetsuji Arafune. It is ranked #11 amongst all B-Rank units in Border. It's formed entirely by Snipers (not counting the operator).

Tetsuji Arafune

B-Class, Sniper
18 Years
Voiced by: ???

The leader of the Arafune Unit.

  • I Am Not Left-Handed: He was a rather high-ranked Attacker before switching to Sniper. Thus he still carries a Kogetsu to defend himself in close combat.
  • Nice Hat: A cap.
  • Sword and Gun: Can use a Kogetsu in close combat in addition to being a Sniper.

Yoshito Hanzaki

B-Class, Sniper
18 Years
Voiced by: ???

  • Nice Hat: A cap, same as Arafune, but he wears it backwards.

Atsushi Hokari

B-Class, Sniper
16 Years
Voiced by: ???

Rin Kagami

B-Class, Operator
16 Years
Voiced by: ???

Kakizaki Unit

An B-Rank unit led by Kuniharu Kakizaki. It is ranked #13 amongst all B-Rank units in Border.

Kuniharu Kakizaki

B-Class, All-Rounder
19 Years
Voiced by: ???

The leader of the Kakizaki Unit.

Fumika Teruya

B-Class, All-Rounder
16 Years
Voiced by: ???

Kōtarō Tomoe

B-Class, Gunner
14 Years
Voiced by: ???

Madoka Ui

B-Class, Operator
16 Years
Voiced by: ???

Chano Unit

An B-Rank unit led by Makoto Chano. It is ranked #19 amongst all B-Rank units in Border.

Makoto Chano

B-Class, Gunner
16 Years
Voiced by: ???

The leader of the Chano Unit.

Itsuki Fujisawa

B-Class, Gunner
16 Years
Voiced by: ???

  • Messy Hair: He has a very messy head of jet black hair.

Megumi Tokura

B-Class, Attacker
18 Years
Voiced by: ???


Izuho Natsume

C-Class, Sniper
14 Years
Voiced by: ???

A lazy sniper trainee, who started training together with Chika and became friends with her.

New 3 Idiots

C-Class Agents

A trio of idiotic C-Class Border agents who always try showing off.

Yūgo Kuga

Yūma's father
Voiced by: ???

  • Living Lie Detector: His side effect, which Yūma got due to his Black Trigger.
  • Papa Wolf: He was shown Yūma's flashback to be much more powerful than him and also very protective.
  • Posthumous Character: Sacrificed himself to create a Black Trigger that keeps his son alive.
  • Sacrificial Revival Spell: His sacrifice in order to create a Black Trigger and revive Yūma.

Sōichi Mogami

Yūichi's master
Voiced by: ???

  • Posthumous Character: Sacrificed himself before the series started to create the Black Trigger "Wind Blade".

    Neighbor Worlds 
  • Single-Biome Planet: The different neighbor worlds seem to be this, at least described by Replica.


The maritime nation surrounded by a rich, vast sea.


The cavalry nation where battles are fought on special Trion Soldiers.


The snow country where harsh terrain and climate thwart enemies from attacking.


The god's country and the largest military state.


24 Years
Voiced by: Nozomu Sasaki

  • Achilles' Heel: It's revealed that Hairein's trigger only allows him to turn Trion related objects into cubes for capture meaning that regular objects can still effect him. This ends up leading to his defeat near the end of the arc once Osamu deactivates his Trigger meaning that Hairein's Trion animals have absolutely no effect on him and he's forced to attack Osamu directly making him vulnerable to Mira and Yuma's attacks.
  • The Beastmaster: At least appears like one, because his Black Trigger "Alektor" creates Birds, Fish and Lizards out of Trion to attack and defend. It's most likely just shaped energy balls though.
  • Big Bad: Of the Large-Scale Invasion Arc since he's the one whose leading the other Aftokrator Neighbours in capturing the C-Rank members of Border.
  • Combat Pragmatist: Not against using underhanded tricks like asking Moira for assistance and stabbing Kyosuke from the back with one of her portals.
  • The Captain: Of his group.
  • Oh, Crap: Has a couple of these looks over the course of the last part of the invasion arc once his plans start falling apart.
    • Firstly once he realises Viza was defeated by Yuma.
    • Secondly when Osamu deactivates his Trigger forcing Hairein to confront him directly.
    • Finally once he realizes that that Osamu's true aim was his ship the entire time and he's forced to flee without capturing "The Golden Goose".
  • Pacifist: Describes himself as one, and at least it can be said he doesnt approve unnecesary violence.
  • Pragmatic Villainy: Why he doesnt want his team to make a full attack on earth. He is actually afraid that forcing the earth defenders too much would make them desperate enough to create Black Triggers thus making them far more powerful.
  • Reasonable Authority Figure: Towards his team, even asking for feedback from Lamvalein about his choices as a leader.
  • The Stoic: Always calm, even when things start going against his favor.
  • Stun Guns: Not a gun and not conventional stunning, but his Trigger can turn it's victims into Trion cubes without causing actual damage. Which is very useful when capturing enemies.
  • You Gotta Have Blue Hair: In the anime.


24 Years
Voiced by: Junichi Yanagita

  • Arm Cannon: His Trigger "Chelidon".
  • An Arm and a Leg: Loses his leg for being too confident of his incoming victory around Midorikawa.
  • The Brute: Averted. Looks like this because of his size, but hes actually a long range fighter with some honor inside.
  • Beam Spam: The cannon-batteries that he can grow out of his shoulders can fire a huge array of beams at multiple enemies and wipe out entire squads at once.
  • Graceful Loser: Congratulates Yoneya for defeating him and doesnt seem at all conflicted about it.
  • Impaled with Extreme Prejudice: By Yoneya.
  • Jet Pack: A feature of his Trigger which allows him to fly and bomb his enemies.
  • Morph Weapon: His Trigger, which can whip out various cannons at different parts of his body.
  • More Dakka: His main strategy in fights.


20 Years
Voiced by: Toshio Furukawa

  • Blood Knight: Very interested in killing humans.
  • The Brute: Though he displays some intelligence, correctly figuring out how the members of Kazama unit are dodging his attack and how Suwa unit are tanking his attacks, he also displays huge arrogance, meaning he plays this role to his group.
  • I Shall Taunt You: Constantly calling his opponents "Miden Monkey" to provoke them.
  • Jerkass: Which in turns gets him killed when Moira decides they have enough of him pissing off everyone.
  • Killed Off for Real: Was killed by his own allies before Border could take him prisoner.
  • Morph Weapon: His Black Trigger "Vorvoros" can turn his entire body into liquid or gas.
  • Mismatched Eyes: A product of Vorvoros messing with his head.
  • Nigh-Invulnerability: Of either the "Made out of Air"- or "Made out of Liquid"-variety. His only weak point is a small, always moving orb in his body.
  • Person of Mass Destruction: Can cause massive damage with his Black Trigger and has no qualms doing so.
  • Sadist: He really enjoys mindless destruction and talking down to his opponents. Moira says this personality was caused by his trigger.


16 Years

  • The Comically Serious: After being stranded in earth where he has to interact with Tamakoma weirdness.
  • Extra Ore Dinary: His Trigger "Lampyris" makes him capable of controlling magnetism.
  • Morph Weapon: His Trigger consists of countless metal parts that he can freely form.
  • Sempai/Kohai: This seems to be basically his relationship with Hairein, where he is the Kohai and Hairein the Sempai.
  • Tranquil Fury: His usual mood.
  • Winged Humanoid: Can create metallic wings on himself and allies, though the flight actually works by being shot through a magnetic track like a railgun.

Moira (pronounced Mira)

23 Years
Voiced by: Yurie Kobori

  • Arranged Marriage: Either with Lamvalein or Hairein.
  • Bob Haircut
  • The Dark Chick: Her dark clothes and mean but loyal personality seem to point at that.
  • The Evil Genius: She seems like the closest thing to an operator the invasion force has.
  • In the Back: Kills Enedra in order to recover his trigger, saying that was all she was supposed to recover
  • Evil Redhead: Possibly the most evil of her teammates not counting Enedora.
  • Sexy Secretary: Has the looks of it, and also acts as a
    • Mission Control: To the rest of the group until she finally enters the battle herself.
  • Thinking Up Portals: Her Black Trigger can create portals, which can be used to retreat allies. They can also be used as spikes to impale enemies.


65 Years
Voiced by: Hiroshi Naka

  • Affably Evil: Is easily the nicest guy amongst the Invading Neighbours, commenting that kidnapping children doesn't sit right with him and congratulating Yuma when he manages to score the deciding blow against him. That being said though he is still invading the human world and can be pretty ruthless when he has to be.
  • Badass: Seemingly the biggest Badass amongst the invading Neighbours to the point that the fact that Yuma actually managed to defeat him causes the usually Stoic Moira and Hairein to have major Oh, Crap moments.
  • Badass Grandpa: This clearly is the case. Seems very old and still battles on even grounds with the thus undefeated Yūma. This is especially impressive when you consider that because of his age he's the only member of the Invading Neighbours not in possession of horns to better control his Trion but makes up for it with his extensive battle knowledge and powerful Black Trigger.
  • Beware the Nice Ones: He is more gentle than most of his fellow countrymen, but also seems to have a darker side which he rarely shows.
  • Blade Spam: His power.
  • Blood Knight: A calmer and subdued variant in contrast to Enedora, but when defeated admits to never get enough of battles.
  • Cool Sword: His Trigger "Organon" is actually a sword hidden in a walking staff.
  • Eyes Always Shut: Always, without exception.
  • Graceful Loser: Takes his defeat at Yuma's hands pretty well, commenting that he can never get enough of combat, and calmly telling his boss that the one who defeated him is coming his way.
  • Instant Death Radius: Pretty much how Organon works, creating circular blades that cut through everything on the area that surrounds him.
  • Magic Staff: His Trigger might count, though it actually hides a sword. Can create energy blades everywhere around him.
  • Nice Job Fixing It, Villain: Lying to Yuuma was his greatest mistake.
    Yuuma: You know.... You make up some stupid lies.

Unknown Country


40 Years
Self-Defense Leader
Voiced by: ???

  • Ambiguously Brown: The people of his country have a rather dark skin compared to other humans and even Neighbors in the series.


17 Years
Raymond's Daughter
Voiced by: ???


Raymond's Son
11 Years
Voiced by: ???

    Other Characters 

Osamu and Yūma's school

  • Meaningful Name: Each one of Osamu and Yūma's classmates has a number on their name.




Voiced by: Umeka Shouji


15 Years
Voiced by: Eri Nakao


15 Years
Voiced by: Yurie Kobori


15 Years
Voiced by: Yuusuke Handa

  • Fan Boy: Of Border. He also wants to join border.


15 Years
Voiced by: Ryouhei Arai

3 Idiots

Voiced by: Mitsuo Iwata (No. 1), Kouta Nemoto (No. 2), and Hiroaki Miura (No. 3)

  • The Bully: They're the stereotypical bully, times 3.
  • Comic Trio: Principally when Yūma is around.

Saho Arashiyama

Voiced by: Hiromi Konno

Jun's younger sister

Fuku Arashiyama


Jun's younger brother


Kasumi Mikumo

39 Years
Voiced by: ???

Osamu's mother who was first seen visiting him in the hospital after the large-scale invasion. She was highly sceptical of her son joining border but later realized that he has found his purpose protecting people as an agent.

Rinji Amatori

Voiced by: ???

Chika's brother, who went missing, presumably kidnapped by neighbors. For reasons unknown, he was against Chika from seeking protection with Border.

Chika's Friend

Voiced by: ???