The characters of World Trigger.
Mikumo Unit / Tamakoma-2The main characters of the series form a squad with Osamu Mikumo as their leader. They are currently part of the Tamakoma Branch.
- B-Class, Shooter15 YearsVoiced by: Yuki Kaji (Japanese), Brian Doe (English)
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.
- Adorkable: A little awkward, constantly nervous, and not all that impressive. Very sweet and endearing, though, and easily gets along with just about anyone.
- Awesome by Analysis: He is great at analyzing the situation and creating new strategies on the fly with what limited resources he has.
- Badass on Paper: Osamu's accomplishments are typically hyped up to sound a lot better than they actually were, such as when he had a draw with Kazama. Yes, the last match was a draw, but he lost 24 times before that.
- 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.
- Chronic Hero Syndrome: He'll jump in to help anyone in need, including the very people bullying him.
- Combat Commentator: For Tamakoma-2's first rank battle, as he was still recovering from his injuries and so sat it out.
- Determinator: During the second invasion, he does absolutely everything he can to protect the cube-ified Chika, whom Aftokrator is targeting. He nearly dies in the process, but he succeeds.
- Establishing Character Moment: When the class bullies are tossing around another student's pencil case and hit Osamu with it, he ignores the bullies and silently gives it back to its original owner (all the while nervously sweating): he'll always try to do what's right, but doesn't like to make a big deal out of it and lacks confidence.
- Famed In-Story: To a degree. Most Border agents aren't all that recognizable, but post-second invasion, the populace knows about him thanks to his stint at the press conference.
- Fatal Flaw: His desire to help out and/or be useful. Aside from the fact that his Chronic Hero Syndrome has nearly gotten him killed on a few occasions, his biggest mistakes have usually been because he lost sight of his own weakness in the moment. Namely, using Chika's trion to assist Izumi, only to get Chika cube-ified for it, and trying to fight instead of hiding and thus getting sniped by Azuma. It's part of why Spider is such an effective tool for him, as one of the reasons Kitora suggested it: it's a trigger that allows him to keep supporting his teammates even after bailing out, meaning that he no longer has to try so hard to prove himself in battle.
- Following in Their Rescuer's Footsteps: Jin saved his life in the past (namely, when Osamu had snuck into the Forbidden Zone after Border rejected him), and he believes that it's played a part in who Osamu is today.
- Guile Hero: His discussion with the upper echelon to get Hyuse on the team shows that he's not half-bad at negotiating, including using the very same tactic Netsuki once used against him (i.e. planting someone to voice dissent, thus providing him with the opportunity to bring up the counterargument).
- Hard Work Hardly Works: Played with. Osamu can't seem to catch up to the others no matter how hard he tries... because not only do they have years of experience over him, they're working just as hard. As Kitora points out, it would be unreasonable to expect that he could be on their level with just a bit of training, and that it'd be two years before he could genuinely catch up (and that's being generous). On the flip side, despite his low trion levels, Osamu's hard work does have visible results, such as when he fights a Marmod for the second time—just not when he's comparing himself to similarly dynamic human beings.
- Humble Hero: Humble to the point of being a doormat.
- Living a Double Life: Initially, his classmates don't know that he's a Border agent and he'd rather keep it that way, even though that bit of knowledge would stop any bullying towards him.
- The Leader: As per Yuma's condition for joining, Osamu becomes captain of Tamakoma-2. He's confused at first, but it becomes increasingly clear why Yuma (and Chika) thought he'd be an effective leader.
- 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 apparently important enough to be in a private meeting with Kido and the other higher-ups of Border.
- My Life Flashed Before My Eyes: During his unconscious state during his Near-Death Experience, he goes through a series of quick flashbacks of how he ended up joining Border.
- Near-Death Experience: At the end of the second invasion, where he's hospitalized and essentially comatose for a while.
- Morph Weapon: Raygust.
- Nervous Wreck: Mildly, in comparison to some other characters, but he's usually seen nervously sweating. His volume profile even pokes fun at it.
- 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.
- Positive Friend Influence: He's responsible for helping Yuma adjust to Earth culture, after Yuma grew up in the constant warzone that is the Neighborhood, and eventually focuses on giving Yuma something to live for again, once Yuma realizes he can't bring back his father from his Black Trigger.
- Refused by the Call: It's eventually revealed that Border actually rejected him, presumably because of his low trion levels. How he managed to get in despite this is still unknown, though it's implied Jin had a part in it.
- 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.
- Screw the Rules, I'm Doing What's Right!: As a C-Rank trainee at the start, he's not actually allowed to use his trigger in a real fight. Doesn't stop him from doing so to protect his classmates, and he explicitly states that he wouldn't change his decision.
- Secretly Selfish: Downplayed. He dislikes people praising him for going out of his way to help Chika, since as he states, he's really doing it for himself as well: that joining Border was his way of coping with his frustration over his own helplessness.
- Shirtless Scene: Takes off his shirt in episode 58 to blindfold a Trion Soldier and remains shirtless for the succeeding episode.
- Small Steps Hero: Osamu Mikumo is an archetypical Small Steps Hero, as he makes it flat out clear many times that he will not ignore the plight of any helpless person to save his own life or to prevent a future tragedy/conflict. This comes back to bite not just him, but everyone on Earth after using his trigger in real battle teaches the Neighbors that C-Rank Border agents can't Bail Out (a mechanism which allows them to teleport to safety when taking fatal damage). Because of this, a large-scale invasion happens that claims more lives than he originally saved, but Osamu makes it clear he'd do it all over again.
- Smart People Wear Glasses: One of the few people wearing glasses and definitely smart.
- Socially Awkward Hero: Can jump into danger without reservation, and when it counts, he can even stand up to bullies and make public speeches (though in the latter case, he falls apart a tad once out of the moment), but overall, dealing with people tends to make him nervous.
- Specs of Awesome: He has his moments.
- The Strategist: His primary role in the team.
- Supporting Protagonist: To a degree. His own development is one of the backbones of the series, but at the end of the day, the one whose motivations—going on the expedition, etc.—drive the plot forward is Chika, not him.
- 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.
- Take a Third Option: Of sorts, but one of the biggest points of tension in the large-scale invasion is that at least one future leads to Osamu's death. In the final stretch, however, when things seem hopeless, he and Replica choose to enact a plan that, by Replica's own admission, is one that guarantees nothing as it's outside of Jin's precognition—that is, throwing Replica into Aftokrator's away ship.
- 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.
- Trap Master: Once he starts using Spider. It's much easier for him to master it within a short time frame rather than master direct combat, since as Kitora puts it, buildings don't move.
- Walking Shirtless Scene: For episodes 58 and 59, considering he takes off his hoodie to blindfold a Trion Soldier. Made even more hilarious by the fact that he didn't take his shirt off at the beach.
- Walking Swimsuit Scene: For at least four episodes, from episode 56-59 by virtue of being captured by Gieve while still wearing a hoodie with green swim shorts.
- The Watson: In the beginning, he's still relatively new to Border and therefore needs most of the world's mechanics explained to him, as does the reader.
- 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.
- What You Are in the Dark: Part of why he fights, even when outmatched. As he tells Yuma, if he runs away even when people wouldn't begrudge him for it, he'll inevitably run away again when it matters—that this is how, in his opinion, humans are.
- Wise Beyond Their Years: Mikumo is incredibly mature for his age, deciding to keep his working for Border a secret despite the fact that it would likely scare off the school bullies and working hard to get good grades.
- B-Class, Attacker15 Years
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 definitely 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 willingly 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 Neighborhood he has a brilliant strategic mind for battles. Finally, during the second Neighbor Invasion he manages to defeat Viza in his normal Trion body and use the last of his power to finish off 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 might give a hint (though it actually isn't entirely natural).
- 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.
- Brought Down to Badass: As a member of Border, Kuga is restricted from using his Black Trigger mostly due to Interservice Rivalry. So he has to learn how to use the normal triggers other Border members use.
- Brutal Honesty: Has no issue with voicing his opinion (and generally only holds back if there's a practical reason to do so).
- Catchphrase: Some variation of, "You tell some boring lies," when he's using his Side Effect.
- Characterization Marches On: He was somewhat more emotive at the beginning of the series (e.g yelling at Osamu in confusion over Osamu's Chronic Hero Syndrome), compared to his characteristic unflappable attitude now.
- Combat Parkour: His primary fighting style.
- Crazy Enough to Work: How he defeats Viza. Knowing that he's outclassed in both skill and experience, he's forced to use something that relies on neither: i.e. his unique circumstances of being in a trion body before his transformation.
- 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.
- Dissonant Serenity: Often cheerful and/or silly even during serious moments.
- Dual Wielding: Prefers using two Scorpions when not using his Black Trigger.
- Experienced Protagonist: In contrast to Osamu, Yuma already has years of combat experience under his belt with the skills to show for it. However, it's played with: he's as new to Border as Osamu is and therefore also needs some explanations (not to mention his unfamiliarity with Earth in general).
- Fish out of Water: Completely unused to Earth customs. A minor Running Gag is him getting hit by cars (because he forgets that you can't cross the street whenever) and being confused by money.
- Friendly Rivalry: He ends up developing this with various characters (notably, Midorikawa, Ko, and Kage).
- Godzilla Threshold: Using his Black Trigger is this for him, as he's liable to get in trouble for using it otherwise.
- 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.
- Locked into Strangeness: The white hair is part of his trion body, which he's stuck in. His real hair colour is black.
- 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 training in 0.4 seconds and secondly for curb-stomping Midorikawa 8-2.
- Morph Weapon: Both his black trigger and the Scorpion.
- Normal Fish in a Tiny Pond: Slightly. While the start of the series constantly shows off how good he is, things change once more of Border is introduced. Without his Black Trigger, Yuma is still extremely skilled, but it's largely due to his experience; compared to the top tier of Border, especially against similarly experienced agents, he isn't the best.
- 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.
- Shirtless Scene: Goes to an indoor beach in episode 56.
- Skilled, but Naïve: 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. He learned it from Midorikawa.
- Stepford Smiler: Behind Kuga's usually antics belies a young boy who feels he has nothing to live for and is just waiting until his death happens.
- Survivor Guilt: Seems to have some form of this, as he wants to undo his father's Black Trigger to bring him back to life, even though said Black Trigger is all that's keeping Yuma alive.
- Swiss Army Weapon: Just look at all the abilities of his Black Trigger listed here...
- Technician vs. Performer: The Technician to Midorikawa's Performer in their first fight. Whereas Midorikawa tries to show off, Yuma is concerned only with defeating his opponent as efficiently as possible.
- 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.
- B-Class, Sniper13 YearsVoiced by: Nao Tamura (Japanese), Caitlyn Bairstow (English)
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.
- Affectionate Nickname: Chikako, as dubbed by Izuho. Toma starts using it for her as well.
- Badass Adorable: She's the cutest little kid you could think of... and also able to fire an almost unstoppable Death Ray.
- BFG: She uses an Ibis, the heaviest Sniper Trigger Border has available. When she fires it, it's less of a plain Anti-Tank gun, and more like a Wave Motion Gun that can blow entire buildings to rubble.
- 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. Girl's got it rough to say the least.
- Born Winner: Naturally born with Black Trigger-levels of trion. Though, considering all the misery it's brought her, one might argue against the winner part.
- 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.
- Extreme Doormat: She generally goes along with whatever Osamu and Yuma decide, though it's implied that it's less that she genuinely has no opinions and more that she doesn't want to be a burden, and so keeps her thoughts to herself. And, at the end of the day, it's her desire to be on the expedition team that drives the team forward.
- Friendly Sniper: For all her destructive potential she is the sweetest girl you could think of.
- Good Is Not Soft: Played with. Being a very sweet girl, it's unsurprising when it's later revealed that she can't bring herself to shoot people. However, as Toma notes, there's a difference between "doesn't want to shoot" and "cannot shoot", and he's confident that she isn't the latter—she's otherwise very willing to snipe and help her team however she can, so it's not that she's unsuited for fighting. He fully believes that if cornered, she will fire.
- Guilt Complex: She's developed one thanks to being Blessed with Suck. She essentially blames herself for her Dark and Troubled Past, and it's likely why she's quick to feel down when she thinks she's troubling her team in any way.
- Heroic BSoD: She has a near trauma-induced shutdown during the second invasion, but fortunately snaps out of it when she remembers that she joined Border precisely so that she could handle situations like these and picks up a rifle to save Natsume.
- Heroic Self-Deprecation: She doesn't particularly value her own well-being, thanks to her trauma. Her teammates have noticed, and thus they try to discreetly encourage her to think more of her own life.
- Idiot Hair: In the middle of her head.
- In-Series Nickname: She is 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.
- Nice Girl: Very sweet and never seen angry (though her reluctance to use honorifics with Hyuse suggests that, no matter how accepting she might seem, she's not entirely forgiving about him being a former enemy who personally tried to kidnap her).
- Nice Job Breaking It, Hero!: When Ema asks if she also thinks Hatohara was a shoddy sniper for being unable to shoot people, she reassures him by explaining that no, she's the same... to which he tells her that, uh, he's her next opponent. Luckily, it ends up subverted, as he becomes one of the best people she could've told.
- The Not-Love Interest: To Osamu. He's very devoted to her, but although a few characters tease at the idea of them being an item, there's nothing to indicate they have any romantic feelings for each other (and both have had more Ship Tease with other characters).
- Oblivious to Love: She's most likely unaware that Ema has a crush on her.
- Pint-Sized Powerhouse: Small stature, ridiculous amount of Trion.
- Reluctant Warrior:
- Mostly by virtue of being a sweet, pacifistic little girl. She has no problem with shooting lifeless targets, buildings and Trion soldiers, but she can't bring herself to directly shoot humanoid targets (even though they wouldn't die anyway).
- Ch. 179 reveals it's more complicated than everyone thinks. Chika admits she's not actually that scared of shooting people. She's worried that if she takes advantage of her abnormal trion levels and goes all out, others will fear or resent her for it, and thus she presents herself as "weak" in order to be liked.
- Secretly Selfish: Chika thinks she is, since her reasons for being unable to shoot others are rooted in her desire to be liked, and similarly, she feels that if she ever does shoot someone, it'll be less because she wants to help her team and more because she doesn't want to be blamed for not doing anything. With that said, it's very clear that her Guilt Complex and Heroic Self-Deprecation play a part in this, and Usami and Reiji reassure her that this a completely normal way to think.
- Sensor Character: She possesses a Side Effect that allows her to detect when Neighbors are about to appear.
- Shrinking Violet: She's a bit on the timid side.
- Stepford Smiler: Typically smiling to the point that it's become her default expression, but she's definitely traumatized by the events that have perspired around her in the past. Consequently, she doesn't have much in the way of self-worth and is particularly troubled. As the second invasion showed, it takes a tremendous event to shake her but once it does she nearly breaks down altogether.
- Tareme Eyes: A trait shared by none in the manga.
- Trick Bullet: How she gets around the whole "can't shoot people" thing. Ema introduces her to the Lightning + Lead Bullet combo, allowing her to shoot with the full reassurance she isn't actually causing damage.
- Unable to Cry: Osamu has only ever seen her cry once, ever (that is, when her brother disappeared and Chika believed it to be her fault). Even when Osamu is hospitalized and essentially comatose, his mother notes that Chika didn't cry at all.
- Unskilled, but Strong: HUGE Trion-supply, but still an inexperienced trainee and not the best shot even among the new snipers.
- S-Rank, Attacker19 Years
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 people's futures.
- The Ace: Never anything less than confident, being immensely skilled and able to see the future to some degree.
- Barrier Warrior: Uses Escudo, and his trigger setup reveals that he has a very defensive style overall.
- Big Brother Mentor: He plays this role to Tamakoma-2, though more of a sneaky version (as they already have Tamakoma-1 as their direct mentors). He also has a bit of this with Karasuma, in comparison to Jin's relationship with Reiji, who is more of an equal to him.
- Catchphrase: "That's what my side effect tells me", and "Want some rice crackers?" Both are lampshaded, with other characters repeating them at various points.
- 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.
- Didn't See That Coming: Given that he can see the future, it's notable whenever his Side Effect fails him.
- He's caught off-guard by Kazama's Mole Claw, though luckily for him, it doesn't cost him the fight.
- From the looks of things, he wasn't entirely expecting Karasuma to try and Screw Destiny (likely because it directly involved Hairein and Moira, who are outside of Jin's foresight), as he's mildly surprised when Karasuma changes the future.
- Osamu and Replica's ultimate plan of having Replica hack Aftokrator's away ship is noted to be a path Jin wouldn't have foreseen, though as it leads to a future where Osamu survives, Jin just breaks down into relieved laughter.
- He's definitely surprised when Yotaro chases after Hyuse (apparently leading to one of the least likely futures he saw), to the point where he has to drop his current plan and go after him.
- Forgotten First Meeting: Subverted. At first, it seems like Jin doesn't recognize Osamu (whom he saved), but it's soon revealed that he does.
- Friendly Rivalry: With Tachikawa. Though the Black Trigger Retrieval arc pits them on opposite sides, they actually get along very well. Jin notes that the most fun he has in Border is when he's fighting Tachikawa and Kazama.
- The Gadfly: Usually with benevolence, but he seems to enjoy messing with people (e.g. randomly lying about Osamu and co. being his younger siblings).
- Guile Hero: By effectively utilizing his side effect and his wits, he can manipulate events to achieve the best outcome he could.
- For example, negotiating with Commander Kido to recognize Yuma as a member of Border despite the fact he is a neighbor. 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.
- Heroic Sacrifice: Downplayed. To persuade Border to allow Yuma's enlistment, he gives up Fujin, despite its sentimental significance to him. Luckily, Kazama declines it and Miwa, the next candidate, returns it, at which point it's decided that any of its candidates will be free to use it, including Jin himself.
- Limited Wardrobe: Deliberate in his case. He's almost always in his trion body, and his normal clothes apparently resemble his uniform anyway, making it difficult to tell when he's not in his trion body.
- Mellow Fellow: Very chill and always goes at his own pace.
- Morph Weapon: The Scorpion Trigger, which was created by himself.
- The Needs of the Many: He knowingly orchestrated a future that put specifically Osamu in danger, as it benefited the greater good for Aftokrator to target Chika (and therefore Osamu by association) if it meant they left the rest of the city alone. Suffice to say he felt awful about it.
- No Sense of Personal Space: Personal boundaries are not Jin's strong point.
- Old Soldier: One of Border's first agents.
- Prophet Eyes: Possesses these as his Side Effect.
- Razor Wind: His Black Trigger Fujin 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.
- Stepford Smiler: It's more implied than anything, but there are hints that he's not as happy as he seems.
- 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.
- Tragic Keepsake: His sunglasses are implied to be this, as they suspiciously resemble Mogami's in the Old Border photo.
- Tropoi Autonomous Trion SoldierVoiced by: Hideyuki Tanaka (Japanese), Marco Soriano (English)
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 Neighbors ship to the outside world in order to force the ship to leave the planet. This forces the Neighbors 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.
- Mr. Exposition: A large part of his role is explaining the worldbuilding.
- 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 Neighbor Worlds, but triggers too. Not only is he the A.I. that controls Yuma's Black Trigger but his extensive knowledge of the Neighborhood allows him to update Border's systems, create a replica Rabbit after analyzing one of the original models, and, with Osamu's help is ultimately the one who forces the Aftokrator neighbours to retreat.
- Border Headquarters Commander-in-Chief43 YearsVoiced by: ???
- Awesome Mc Coolname: His name roughly translates to Righteous/Justice Demon Way.
- Commanding Coolness: A commander, and always really calm.
- Cynicism Catalyst: The death of over half the older Border team during the defense of an allied Neighbor nation its what turned him into the stern man he is now.
- Distinguishing Mark: He has a very visible scar on his face. It turns out he probably got it in the defense of an allied nation, the same incident that killed Mogami and over half the members of Old Border.
- Eyes Are Unbreakable: Despite his scar being dangerously close to his left eye, his eye is completely intact and working.
- Fantastic Racism: Shūji seems to partially take after him at that.
- A Father to His Men: It's discreet, but it's there. When the expedition team returns, he states that the most important thing is that they've returned safely, and in light of the reveal about Old Border, it's safe to assume that not losing a good chunk of his subordinates plays a large part in his motivations as a whole, including his more jerk-ish ones.
- Jerk with a Heart of Gold: He seems to have a streak of honesty and honor, as he accepted Replica's deal of protecting Yūma (if he was lying, Yūma would know).
- Kick the Dog: Refers to Amo as a tool. The rest of the staff is unimpressed with his attitude.
- Knight Templar: The entire Kido Faction, but it applies mainly to him.
- Non-Action Guy: While Border's Commander, he doesn't appear to have any combat ability himself, in contrast to Shinoda (BBF doesn't list any stats for him either, further implying this).
- Pet the Dog: He asks after Osamu's well-being and informs him that Shinoda and Rindo had nothing to do with Netsuki's attempted Frame-Up. It's one of his few acts of kindness with no apparent ulterior motive.
- Sharp-Dressed Man: Always on a nice suit.
- The Stoic: At his worst, he looks sightly pissed off.
- Used to Be a Sweet Kid: Or younger man, rather. He's seen smiling in the Old Border photo, startling Osamu once he realizes who it is.
- Headquarters Development Chief49 YearsVoiced by: ???
- Animal Motifs: Racoons, according to the Extra Material.
- Friend to All Children: He seems like a jerk, but he has a soft spot for young children because of his daughter.
- Gadgeteer Genius: He's the one responsible for Border's technology.
- Gonk: Has a rather... Easily recognizable face.
- Hair-Trigger Temper: Doesn't take very much to make him snap.
- Hidden Heart of Gold: He acts tough around Hyuse, their prisoner of war, pointing out that they could always torture him if he refuses to speak. Yuma, however, cheekily points out later—as proof of his lie-detecting Side Effect—that Kinuta didn't mean any of it.
- Jerkass: At the beginning at first. Then we get to know him and he is somewhat decent, if short tempered.
- Miniature Senior Citizen: Gets smaller in every new appearance.
- Papa Wolf: He has a bit of this in him towards Chika. Apparently, he was the one who most advocated promoting her to B-Rank so that she could be equipped with bail-out.
- Shorter Means Smarter: Short as hell, but also the number one academic genius of the series.
- Trap Master: In charge of setting all the traps against the invaders during the Second Invasion.
- Head Engineer21 YearsVoiced by: ???
- Gadgeteer Genius: As goes with his position.
- Hidden Badass: He was a former top-class Kogetsu user, though you wouldn't guess it at first.
- Morality Chain: Sort of. He's the one who keeps Enedra(dd) cooperative, but mainly because he knows how to appeal to him: by bribing him with movies.
- Rage Quit: The reason he's no longer an Attacker? Because the rise of popularity in bullet triggers pissed him off, so he became an engineer instead and developed Raygust to counter them.
- The Stoic: Not very emotive.
- Media Countermeasures Chief39 YearsVoiced by: ???
- Frame-Up: Frames Osamu for Aftokrator knowledge of the lack of Bail Out in C-Class Agents. It doesnt work thanks to Karasawa.
- It is implied that Border had no intention of giving out Osamu's name or anything but was going to just let the public have a temporary unknown figure to place their anger on.
- Gag Nose: He has a... Very noticeable nose.
- Jerkass: Just like Kinuta, and in turn he hasn't gotten any better characterization yet.
- Subverted when someone points out to him that Osamu one his tricks from the press conference he looks a little sad states that Osamu has learned nothing good from him hinting he did not want to frame him but had no other choice at the time.
- Nervous Wreck: He has his moments. Frequently. In an emergency, he is shown to be the first one to panic.
- Foreign Affairs Operations Manager33 YearsVoiced by: ???
- Can't Hold His Liquor: Lowest tolerance out of everyone in Border who drinks.
- Catchphrase: "I used to play Rubgy when I was younger" is often said by him to explain something about himself.
- Heroic Neutral: He doesn't show interest with the Power Struggle between Kido and Rindō factions (though he's technically in Kido faction), but does have a soft spot for hero-types like Osamu.
- Minored in Ass-Kicking: Not a warrior at all, but seems to be rather strong thanks to his past times as a Rubgy player.
- Nice Guy: Enough to respect Osamu's role during the war and help him clear his name after it.
- Smoking Is Cool: Smokes and is both likable and cool.
- Sweat Drop: Notably for such a calm man, after seeing Osamu's mom's antics.
- Commander of the Self-Defense Unit33 YearsVoiced by: Takeshi Kusao
- Animal Motifs: Tigers.
- Authority Equals Asskicking: Is said to be the strongest agent in Border Headquarters using a normal trigger and can boast a lot of fighting experience, seeing that he knows Yūma's father.
- Badass Longcoat: When in Trigger Mode.
- Dynamic Entry: When going to battle against Enedora, he skips all the hallways and elevators needed to arrive and just does a wall run to get there.
- Godzilla Threshold: As he's needed as a commander, he doesn't enter the fray personally unless it's really bad.
- Master Swordsman: Fought Enedora'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 at HQ (excluding those with a Black Trigger).
- The Mentor: For Kei Tachikawa.
- Morph Weapon: Using the trigger "Senkū" (Whirlwind) that can extend it's blade.
- Not So Above It All: Unsurprisingly for the mentor of Tachikawa, but Shinoda has his moments that you might otherwise not expect from a full-grown man and commander. Aside from the below-mentioned Wall Run, supplementary material notes incidents like: accidentally slicing Kido's car in half, leaving through a window and returning through the window of a different floor, getting into trouble with the authorities for publicly practicing his trigger use and causing a spectacle...
- 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.
- Wall Run: How he arrives to battle. Taking elevators is such a hassle.
- World's Best Warrior: Border HQ's strongest.
- You Are Already Dead: To Enedora.
- General Manager Counsellor25 YearsVoiced by: Houko Kuwashima
- Action Girl: Used to be an Attacker during the first days of Border.
- Ignored Enamored Underling: Shinoda doesn't seem to realize her crush on him.
- Mission Control: During the Second Invasion arc.
- Office Lady: Dresses as this.
- Pervert Revenge Mode: Openly beats Jin's ass for touching her.
- Sexy Secretary: For Shinoda, whom she has a crush on.
- Tamakoma Branch ChiefVoiced by: Keiji Fujiwara
- A Father to His Men: Would do anything to protect his people at Tamakoma.
- Hidden Badass: While he's yet to be seen fighting, Border Briefing File reveals that not only was he The Mentor to Kazama's late brother, but his stats are actually on par with Shinoda.
- Mellow Fellow: As with Jin, he tends to be fairly relaxed.
- The Mentor: For Shin, Kazama's late brother (it's why he's the only character who calls Kazama by his first name, for those wondering; it's to avoid overlap with Shin, whom Rindo called "Kazama").
- Nice Guy: Very laid back and reasonable.
- Parental Substitute: For Yotaro, who's implied to not be his biological son.
- Perma-Stubble: Has some facial hair growing in his chin.
- Reasonable Authority Figure: Sees neighbors not just as enemies but also useful allies and potential friends.
- Smoking Is Cool: Always smoking and has definitely a cool attitude with his position.
- Torture Is Ineffective: Or at least, he believes it lefts too much scars in both the torturer and the tortured.
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.
- Establishing Character Moment: When they meet Tamakoma-2 for the first time and Jin claims these newcomers are his siblings:
- A-Class, All-Rounder21 YearsVoiced by: Tomoaki Maeno
- The Ace: One of Border's best agents overall (and the sole perfect All-Rounder), leader of what Shinoda considers Border's strongest team, strong outside of a trion body as well, and to top it all off, he's good at cooking and various other crafts.
- The Big Guy: Easily one of the most beefy agents of Border.
- BFG: His unnamed Minigun Trigger.
- BFS: The Raygust.
- Crazy Jealous Guy: Played for Laughs, when Yotaro declares Yuri to be his other bride (aside from Chika). Reiji is not amused.
- Crush Blush: While being around Rindo Yuri. He seems to lose all composture with her.
- Gatling Good: An unnamed Minigun Trigger.
- Good Old Fisticuffs: Not completely unarmed, but he uses his Trigger to enhance his fists.
- Half the Man He Used to Be: During the Second Invasion, courtesy of Viza.
- Heroic Build: Lives up to his nickname in episode 56.
- Heroic Sacrifice: Subverted. Having to bail out is fine, but he believes that one should do their utmost to survive, as is the mindset he inherited from his late father, a rescue worker. If you succeed in saving a life but die in the attempt, then rescue failed.
- Homing Projectile: One of his Gunner triggers seems to be a Hound, which has that function.
- Huge Guy, Tiny Girl: With Chika, as is lampshaded when asked who thought that'd be a good combination.
- In-Universe Nickname: "Composed Beefcake".
- Life-or-Limb Decision: Doesn't hesitate to slice off his (trion) arm after Hyuse attaches magnets to it, earning him some respect.
- Long-Range Fighter: He's known to be the only All-Rounder who is also skilled as an Sniper.
- Master of All: The sole perfect All-Rounder. Reflecting that, his customized triggers have a ridiculous number of slots, compared to the standard eight (four per trigger) most agents use.
- The Mentor: For Chika, in sniping. He was also Karasuma's.
- More Dakka: Full Arms seems to work like this.
- Morph Weapon: The Raygust.
- Multiarmed And Dangerous: His Trigger, Full Arms, which makes use of his entire arsenal at the same time.
- Nerves of Steel: Always composed no matter the situation, and can therefore make snap judgments with ease, as his fight against Viza and Hyuse best showcases.
- Not So Stoic: When it comes to Yuri.
- Old Soldier: One of Border's first agents.
- Only Sane Man: Between him, Karasuma, and Konami.
- Real Men Wear Pink: Or rather, cook and do handicrafts (he's responsible for Yotaro's helmet).
- Secret Keeper: He knows the truth behind Hatohara's so-called leaving Border, and is just about the only one who does without actually being related to the incident.
- Shirtless Scene: Wears a speedo in episode 56.
- The Stoic: He remains calm even when firing a gatling gun or after being cut in half!
- Sugar-and-Ice Personality: Stoic and doesn't seem to be entirely comfortable with expressing comfort, but very dere when around Yuri, his crush.
- Sword and Gun: Assault Rifle and Minigun Gunner-Triggers and a Raygust.
- Throwing Your Sword Always Works: Throws the Blade Raygust as a last desperation attack in order to win some time against Viza and Hyuse, managing to stab the old man leg.
- A-Class, Attacker17 YearsVoiced 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 battleaxe, after combining those.
- Ditzy Genius: Very good at fighting and unlike, say, Tachikawa or Yoneya, she gets good grades at school, but also a bit airheaded and more than a little gullible.
- Dual Wielding: The Sōgetsu, in their standard form.
- Friendly Rivalry: With Tachikawa.
- Hair Wings: Part of her hair forms a wing even in her Trion form, through it doesn't serve any purpose and its just decorative.
- Living a Double Life: For whatever reason, she doesn't want her classmates knowing that she's an agent and instead pretends to be an operator, hence the short hair in her trion form and wearing green, the opposite of her favourite colour, red.
- Man Bites Man: A comedic variant, in which she is fond of biting Osamu head when Kyosuke pranks her.
- Master of All: As an All-Rounder.
- Morph Weapon: The Sōgetsu.
- Old Soldier: One of the very first members of Border—she's been around since even before Jin.
- Power Makes Your Hair Grow: Inverted. Her hair gets short while in her Trion Body form.
- Skilled, but Naïve: 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.
- Sore Loser: She doesn't take it well when Yuma gets a single win off of her (a single one!), and she'll have you know that she's pretty much the No. 1 Attacker no matter what anyone else says, thank you very much. (She's No. 3.)
- 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 be one.
- 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.
- She tries to cover up her shyness with strength, as shown when Kyōsuke told her Osamu had called her pretty.
- A-Class, All-Rounder16 YearsVoiced by: Jun Fukuyama
- Affectionate Nickname: Torimaru, which is a play on the characters that make up his name. Amusingly, Hyuse calls him this as well, leading one to wonder if Hyuse even realizes it's not his name.
- Barrier Warrior: Seems to specialize in defensive Triggers like the 'Escudo'.
- Bishie Sparkle: When outside of combat, he usually has this around his hair.
- Bishōnen: One of the resident handsome characters.
- Brutal Honesty: After Reiji and Konami finish bragging about their pupils, they turn to Kyosuke, who can't even pretend to having something positive to say about Osamu.
- Clueless Chick Magnet: He doesn't seem to realize it, but Kitora, Aki Hiyami, Yoko Katori and probably more girls are interested in him.
- The Gadfly: Frequently lies for the hell of it. Konami in particular is one of his favourite targets, since she always falls for it.
- Informed Attribute: That he's poor, which Ashihara acknowledges as an Informed Attribute in his volume profile (though it's eventually implied a few times, such as the mention of his part-time jobs, or how his jacket is a hand-me-down from Jin).
- In-Universe Nickname: "Scruffy Hottie".
- In the Back: How he is defeated by Hairein and Moira.
- Master of All: As an All-Rounder.
- The Mentor: For Osamu.
- Not So Stoic: When he realizes Hairein was playing him for a fool. The immediate moment and the aftermath are among the few times he's openly upset.
- Screw Destiny: He attempts this during the large-scale invasion, with mixed results. See You Can't Fight Fate.
- Sempai/Kohai: The kohai to everyone else in Tamakoma (before Tamakoma-2 comes along), thanks to being both the youngest and the most inexperienced.
- Shirtless Scene: In episode 56.
- 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.
- You Can't Fight Fate: In the second invasion, he knows that according to Jin's Side Effect, he's doomed to lose anti-climatically and not play a part in protecting Osamu and co. Determined to overturn this, he avoids all fights until the moment arrives and tries to buy Osamu time to escape from Hairein... only to realize at the end that Hairein and Moira never lost track of Osamu, and for him to be defeated by a cheap shot. His frustration over his failure is all too visible, especially for someone who's usually The Stoic. However, it's ultimately subverted; he spreads the info he obtained during the fight, which later helps Miwa in his own fight with Hairein.
- Younger Than They Look: He's sixteen, but compared to the others his age, he looks more like he's eighteen or older.
- You Shall Not Pass!: He attempts this against Hairein, only to realize by the end that Hairein was actually trying to keep him away from Osamu, rather than the other way around.
- A-Class, Operator17 YearsVoiced by: ???
The Main Operator of the Tamakoma Branch. Formerly the operator of the Kazama Unit in the Main Branch.
- Amicable Exes: Platonic version. She used to be Kazama Squad's operator, and while Kikuchihara calls her a "traitor", she's still on good terms with them. (Including leaving her stuff behind in their squad room with unfulfilled promises to fetch them eventually, which they don't mind.)
- Cool Big Sis: She tries to be this for Chika, especially given Chika's self-esteem issues.
- The Gadfly: Very prone to weird antics, especially in regards to glasses.
- Mission Control: Her job.
- Mr. Exposition: When Osamu and co. first join Tamakoma, she does most of the explaining.
- Ms. Fanservice: Appears in a swimsuit in episode 56 as well as the chapter 32 extra.
- The Nicknamer: Responsible for "Scruffy Hottie" and "Composed Beefcake".
- Perpetual Smiler: Pretty much always cheerful.
- Smart People Wear Glasses: Very knowledgeable and resourceful, even by Operator standards.
- Techno Wizard: Downplayed, but she's very skilled with computers and designed at least part of Tamakoma's virtual training program.
- Terrible Artist: No one understands what her drawings are supposed to be.
- 16 YearsVoiced by: Nobunaga Shimazaki
- Animal Motifs: Enedra frequently compares him to a dog, due to his Undying Loyalty. Funnily enough, Hyuse is actually fond of dogs.
- Awesome by Analysis: Most of what he knows about Border's techniques are simply from watching the logs, and after observing a single match, he can essentially pinpoint each of Tamakoma-2's flaws.
- Bio-Augmentation: His horns are this, as part of Aftokrator's technology. They boost his trion.
- Bishōnen: His good looks are frequently noted.
- Boxed Crook: Joins Tamakoma-2 for a chance to get back to his adoptive family.
- Brought Down to Badass: Like with Yuma. He can't exactly use Lampyris as a Border agent, but he's still very powerful using Border's normal triggers.
- Chameleon Camouflage: He can use the reflective properties of Lampyris's magnets to blend in with his surroundings.
- Child Soldier: One of the straightest examples in the series. He was an orphan picked off the streets and made a Super Soldier, and while House Ellin is suggested to treat him as one of their own, earning his Undying Loyalty, it's telling that he still refers to its head as his "master".
- Clueless Chick Magnet: During his enlistment period, a number of girls are attracted to him. He doesn't notice/doesn't care.
- The Comically Serious: After being stranded in earth where he has to interact with Tamakoma weirdness.
- Curb-Stomp Battle: To the C-Rank rookies, and then most of the B-Rank Attackers in a Kogetsu-only match. He's on the receiving end of one himself from Tachikawa, though he manages to get one win against him (which is no easy feat).
- Extra-ore-dinary: His Trigger "Lampyris" makes him capable of controlling magnetism.
- Fish out of Water: On account of being stranded on Earth, where he's unfamiliar with numerous customs.
- Guest-Star Party Member: For Tamakoma-2. He's effectively a Sixth Ranger for now, but he's made it clear that he has no intention of sticking with them for long, beyond what's necessary.
- Happily Adopted: It's suggested that he's this by House Ellin.
- Hidden Depths: His profile mentions that he likes to draw.
- Honor Before Reason: When he refuses to cooperate with Border's questioning as a gesture of goodwill (which he needs), even knowing that Enedra(dd) has pretty much spilled everything anyway. As he puts it, it's not a matter of gains or losses: it's about being able to face his master again with his honour intact.
- Insufferable Genius: He views himself as superior to most Border agents. On the other hand, he's not wrong.
- In the Hood: Usually on his casual attire on earth.
- Jack-of-All-Trades: When designing his Border trigger, he puts in everything but the kitchen sink. Sniping's the sole area he doesn't cover.
- Late-Arrival Spoiler: He ends up as a prisoner of war and later joins Tamakoma. If you're reading this, you already knew that.
- Master of All: His Border trigger makes him what Border would consider to be an All-Rounder, even if he presumably doesn't have the points to officially count as one.
- Moe Couplet: With Yotaro (they were even one of the few 7-star dual units during the mobile game Smash Borders' run!). Around him, Hyuse goes from being stoic, stuck-up, and unfriendly to... stoic, stuck-up, somewhat more friendly, and also a bit of a big brother figure. Expect fans to squee whenever he and Yotaro do a fistbump.
- Morph Weapon: His Trigger consists of countless metal parts that he can freely form.
- Not Afraid to Die: As a prisoner, he states that threat of torture and/or death doesn't unnerve him, and as Kikuchihara confirms, he means it.
- Not So Above It All: Konami's not the only gullible one around. Somehow, he thinks Raijinmaru is just a dog with a really big head.
- Not So Stoic: Almost always cool and composed—making it very notable when, while fighting Jin, Jin outwardly wonders why Hyuse will be abandoned there and Hyuse loses it, likely due to suspecting exactly why.
- Pre-Mortem One-Liner: Said before slicing Reghi apart:
- Punch-Clock Villain: Attacking Mikado City was his job and nothing personal, as far as he's concerned. When he offers to join Tamakoma-2, he truthfully states (at the time, at least) that he no longer cares about capturing Chika and just wants to return home. Him being this trope is also why Shinoda doesn't want to treat him poorly, feeling that Hyuse shouldn't be held completely accountable for his superiors' decisions.
- Sempai/Kohai: This seems to be basically his relationship with Hairein, where he is the Kohai and Hairein the Sempai. Also surprisingly forms a similar relationship to Yotaro of all people.
- Sore Loser: When he hears that he has the second-best record in the enlistment test?note Request another chance to do it again.
- The Stoic: He doesn't emote much.
- Sugar-and-Ice Personality: Cold and blunt if he doesn't like you; however, he's also highly devoted to those he cares about, and in Japan, he shows a kinder side to Yotaro.
- Super Soldier: Of Aftokrator, thanks to Bio-Augmentation.
- Tranquil Fury: His usual mood.
- Undying Loyalty: To Aftokrator. Hairein was however sure he was going to betray them eventually, and so his true Undying Loyalty would be more towards his master.
- 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.
- Worf Had the Flu: Downplayed—in a Kogetsu-only bout, he's roughly on par with Ikoma (and loses to Tachikawa), but it's also noted that this is Hyuse when he's rusty with a sword. He also loses 8-12 to Yuma, but this is when he's essentially never touched any of the triggers he's currently using before.
- Civilian5 YearsVoiced by: ???
- Balloon Belly: In episode 60.
- Butt-Monkey: Often gets hit comically.
- Faking the Dead: When Hyuse needs to deceive Reghi and pretends to stab Yotaro with a Scorpion.
- Happily Adopted: Implied. Rindo doesn't seem to be his biological father, and the series has been suspiciously vague so far about who his parents were. Regardless, he's very happy with Tamakoma.
- Hero-Worshipper: He looks up to Tamakoma (Jin and Reiji in particular) and can't stand it when they lose.
- Moe Couplet: With Hyuse. Yotaro's loud personality seems to be actually welcome for him, most likely because it means Yotaro's the one person who just sees Hyuse as a new friend rather than as the prisoner of war that he is.
- Morality Pet: To Hyuse. While Hyuse doesn't care for most of Miden, Yotaro is pretty much the one person he likes and is kindest to.
- Senpai Kohai: With Hyuse of all people.
- Small Name, Big Ego: Prone to considering himself superior to pretty much everyone.
- Speaks Fluent Animal: According to Volume 3, he is capable of talking to animals. However, this ability hasn't really been demonstrated.
- Tagalong Kid: A kid who happens to hang around with the most elite agents of Border.
- Ambiguous Gender: Everyone assumes Raijinmaru's a he, but Ashihara commented on the possibility of Raijinmaru actually being a female.
- Horse of a Different Color: Yōtarō frequently uses him as a mount.
- Inexplicably Awesome: Where did he come from? We just don't know.
- Team Pet: A big Capybara who serves as Yōtaro's pet, he believes it to be female, though.
- Memetic Badass: Border Official Guide tends to give it the best stats as a joke.
- Chief Rindo's Niece and an Operator for Tamakoma
- Comically Missing the Point: When Osamu fails to recognize Kido in the Old Border photo and is shocked when she points him out, she explains that he didn't have the scar yet—except no, it's the fact that the man was smiling that Osamu can't get over.
- Cool Big Sis: Immediately starts assuming this role to Tamakoma-2.
- Early-Bird Cameo: We see her (or rather, her back) during the second invasion arc, when Tamakoma's unusual status is being explained.
- Tamakoma resident Neighbor Engineer
- Bad Liar: His introduction consists of him stating his name (understandable) and then "Canadian", his cover story (because that's definitely how normal people introduce themselves, right).
- Chekhov's Gunman: He's referenced near the beginning of the series, when Border's upper echeleon remarks that Tamakoma's attitude towards Yuma is unsurprising, given their engineer being a neighbour. We don't meet him until over a hundred chapters later.
- Early-Bird Cameo: Same deal as Yuri.
- S-Rank, ???16 YearsVoiced by: ???
An S-Rank agent of Border who is operating solo.
Not much is known about him so far, aside from him regularly destroying the area he is fighting in.
- Aura Vision: By seeing the colors of people auras he can determine their fighting level and character.
- The Ace: In regards to battle, and thanks to having a Black Trigger.
- Exotic Eye Designs: His eyes look... off, to say the least.
- The Dreaded: Even for the higher ups. Its described as inhuman while he fights.
- Godzilla Threshold: Kido was tempted on using him to retrieve Yuma Black Trigger since both Shinoda and Tamakoma were defending him. The other members of the staff weren't so sure about it.
- Master of All: While not using his Black Trigger, he is a solid All-Rounder.
- Offscreen Moment of Awesome: So far we've only seen the aftermath of his destructive battles.
- One-Man Army: In charge of a whole sector during the Afrokrator invitation, with zero difficulties on his part.
- Person of Mass Destruction: He tends to wipe out entire city blocks along with his enemies.
- C-Class, Sniper14 YearsVoiced by: ???
A lazy sniper trainee, who started training together with Chika and became friends with her.
- Child Hater: According to her bio she hates children, but children seem to be attracted to her personality.
- Head Pet: A cat on her hair, all the time.
- Idiot Hair: Sprouting from her fringe.
- Kindhearted Cat Lover: Carries a rescued cat on her head during the entire invasion-arc.
- Long-Range Fighter: Sniper.
- The Slacker: Chika thinks she could be a good Sniper, but she's too lazy to try.
New 3 Idiots
- C-Class Agents
A trio of idiotic C-Class Border agents who always try showing off.
- Attack Pattern Alpha: They do this, with varying grades of effect.
- Butt-Monkey: They always get into bad situations.
- Calling Your Attacks: With Zodiac Formations.
- Comic Trio: Needless to say.
- Cool Sword: Two of the members use a Kogetsu each.
- Homing Projectile: One of the three uses a Hound.
- No Name Given: In the manga. The anime studio, for the sake of crediting their voice actors, named them Kouda, Hinoe, and Saotome, which Ashihara accepted and used in BBF.
- Sword and Gun: One of the three uses a Hound and the other 2 use Kogetsu.
- Spiritual Successor: To the bullies in Osamu and Yūma's class.
- Voiced by: ???
- Face Framed in Shadow: His complete face is never seen yet.
- Go Out with a Smile: Last seen smiling by Yuma. Left him wondering why all the time.
- Living Lie Detector: His side effect, which Yūma got due to his Black Trigger.
- One-Man Army: He had to be one since his sole presence was enough to turn the tides of war from one side to the other.
- 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.
- Taken for Granite: How his sacrifice kills him.
- Voiced by: ???
- TeacherVoiced by: Yasuhiko Tokuyama
- Department of Redundancy Department: Both Kanji for his name (森 [mori] and 林 [hayashi]) mean "forest".
- TeacherVoiced by: Umeka Shouji
- Department of Redundancy Department: Her name literally translates to "water swamp".
- Hot Teacher: Not exactly "hot", but rather attractive nevertheless.
- Student15 YearsVoiced by: Eri Nakao
- Girlish Pigtails: On the back of her head.
- Student15 YearsVoiced by: Yurie Kobori
- Student15 YearsVoiced by: Yuusuke Handa
- Fan Boy: Of Border. He also wants to join Border.
- Student15 YearsVoiced by: Ryouhei Arai
- StudentVoiced by: Hiromi Konno
Jun's younger sister
- Annoying Younger Sibling: Inverted. Jun seems to be the annoying big brother for them.
- StudentVoiced by: Hisayoshi Suganuma
Jun's younger brother
- Annoying Younger Sibling: Inverted. Jun seems to be the annoying big brother for them.
- Civilian39 YearsVoiced by: ???
Osamu's mother who was first seen visiting him in the hospital after the large-scale invasion. She was highly skeptical of her son joining border but later realized that he has found his purpose protecting people as an agent.
- Dissonant Serenity: Always with the same expression, even when confronting her son or when declaring all reporters should be beaten with a stick.
- Generation Xerox: Looks very similar to her son.
- I Want Grandkids: Not explicitly stated (yet), but she seems to be strongly in favor of setting Osamu up with Chika.
- Mum Looks Like a Sister: Is often mistaken for being Osamu's sister because she looks rather young.
- CivilianVoiced by: ???
Chika's brother and Osamu's tutor, who went missing, presumably kidnapped by neighbors. For reasons unknown, he was against Chika from seeking protection with Border.
- Big Brother Instinct: Wanted to protect Chika by himself, and that instinct extends to Osamu as well.
- Never Found the Body/Chekhov M.I.A.: Went missing after he stole a Trigger and snuck in to explore Neighbor territory.
- The Promise: Made Osamu promise to protect Chika himself for him.
- Voiced by: ???