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First the new models, and now a Black Trigger?! A man can't have a little rest 'round here?

Kōtarō Suwa, in Large-Scale Invasion 14.

Kōtarō Suwa (()() (こう)()(ろう) Suwa Kōtarō?) is a B-rank Gunner and the captain of Suwa Unit.


Suwa anime (2).png

Suwa is a light-skinned, young man of average build. He has medium-length, messy hair dyed blonde, shaved on the sides and back of his head, and short sideburns. He has black eyes with small pupils. One of his causal outfits includes a zipped, camo jacket with a high collar over a dark, long-sleeved shirt.[2]

His unit's uniform is composed of an olive green jacket with black lines around the hem, the zipper, and the high collar, and white ones running along the outer side of the sleeves and around the middle of the collar. There are two piped patch pockets closed by the same flap on each breast, and the B-rank logo is emblazoned above the left one while Border's is located on the outer side of both sleeves a little below the shoulders. The uniform also includes headphones that Suwa wears around his neck, a dark red undershirt with a V-neck, grey pants, a black belt with a dark grey pocket on the left side, and dark grey boots with black spats. In his trion body Suwa is always seen with a cigarette in his mouth.


Suwa is loud, with a bombastic personality that reacts in a big way to everything. He is vulgar and assertive but very approachable and without pretenses, and quick to get comfortable around. When in combat, he has a tendency to be reckless[3] and enjoys teasing opponents and riling them up, as he did with Enedra.[4] He has a cigarette in his trion body to show off.[5]


Suwa Unit[]

Suwa is the unifying force of his unit, raising his teammates' morale.[6] They have a good relationship and hang out together outside of Border duty.[7] Despite his penchant for gambling in battle, Daichi Tsutsumi trusts Suwa,[8] while Hisato Sasamori deeply respects him.[8] All his teammates address Suwa by his surname,[9][10][2] presumably as a sign of respect, although they speak casually to him and Rui Osano has no qualms about teasing him.[2] On the other hand, Suwa calls at least Sasamori by his first name.[9]

Sōya Kazama[]

Kazama and Suwa are the same age and part of the same group of friends, often going out eating and drinking together.[11] On one such outing, Suwa got Kazama so drunk that the latter picked a fight with a postbox.[12] For his part, Suwa is plotting revenge on Kazama for causing his name to become synonymous in Border with trion cubes.[13] They address each other by surname.[14][15]

Reiji Kizaki[]

Kazama, Kizaki, Suwa and Terashima are the same age and part of the same group of friends, often going out eating and drinking together.[11] Suwa addresses Kizaki by his first name, without honorifics,[16] implying closeness, and referred to him by an unflattering epithet ("beefcake gorilla") on at least one occasion.[17]

Raizō Terashima[]

Kazama, Kizaki, Suwa, and Terashima are the same age and part of the same group of friends, often going out eating and drinking together.[11]

Haruaki Azuma, Shinji Fuyushima and Kei Tachikawa[]

Suwa is mahjong buddies with Azuma, Fuyushima, Tachikawa,[18] who gather to play in Suwa Unit's operation room.[BBF Q71] Suwa is very informal around Fuyushima, calling him "old man" while praising his usefulness during Galopoula's blitz.[19]

Mitsuru Tokieda[]

Suwa and Tokieda seem to be on good terms. The two were seen walking and talking together in HQ.[20]

Yūma Kuga[]

Suwa is very impressed with Yūma's skill and enjoys watching him fight.[21] They seem to have grown close at some point after their units competed in a rank battle, since Yūma walked over to Suwa, Sasamori and Tokieda when he spotted them and let himself be playfully manhandled by the captain.[20] Suwa refers to Yūma as the "albino shrimp".[21][1]

Atsushi Hokari[]

Although the relationship between the two is unconfirmed, they might be on good terms since Suwa referred to Hokari by his nickname.[22]

Kyōsuke Karasuma[]

Suwa addresses Karasuma by his first name without adding an honorific,[16] which might suggest they are close.

Shun Midorikawa[]

Midorikawa appears to know Suwa, as he could anticipate how the captain would react to Tamakoma Second's map choice before their match. They both refer to the other by their surnames.[23][17]

Osamu Mikumo[]

Suwa was annoyed with Osamu continuing to challenge Kazama after his 20th consecutive defeat,[21] although he was so swept away by his ingenuity in the last fight that he ended up rooting for him.[24]

Chika Amatori and Ai Kitora[]

Although he does not enjoy his name becoming synonymous with trion cubes, Suwa is relieved that it happened to him rather than Chika or Kitora.[BBF Q172]


  • "First the new models, and now a Black Trigger?! A man can't have a little rest 'round here?"[25]
  • "Stupid A-rank! He makes it sound easy!"[26]
  • (To Enedra) "You don't know what's going on, do you? I can tell by that stupid look on your face."[4]
  • (To Enedra) "Come on, Mr. Black Trigger. Let's have some fun, just like you wanted."[4]
  • (To Enedra) "Oh, nice attack there. Hit me again, I dare you. C'mon!"[27]
  • (About Kizaki training Chika) "What?! How does physics work in that relationship?! What's that beefcake gorilla thinking?!"[28]


  • Suwa likes cigarettes, beer, meat, mahjong and mystery novels.[18][29]
  • The cigarette that is part of Suwa's trion body may not be a real one.[5]
  • Suwa has a driver's license.[30]
  • The author initially described a cube in Suwa's cover profile. He then went on to call him a male version of Izuho Natsume, as well as one of his favorite B-rank agents.[31]


  1. 1.0 1.1 1.2 World Trigger Manga Chapter 87 (p. 9)
  2. 2.0 2.1 2.2 World Trigger Manga Chapter 91 (p. 12)
  3. World Trigger MangaBorder Briefing File (p. 159)
  4. 4.0 4.1 4.2 World Trigger Manga Chapter 65 (p. 19)
  5. 5.0 5.1 Daisuke Ashihara: It’s to show off. Since there have been no depictions of ashtrays, there is also the possibility that it might not actually be a cigarette.
    Source: Question Corner 9, Volume 10
  6. World Trigger MangaBorder Briefing File (p. 156)
  7. Daisuke Ashihara: Q135: Do Border agents visit and play with their friends on their squad outside of missions? A: There are squads that do, and squads that don’t. Kako Unit, Suzunari First, and Suwa Unit look like they would all go out together.
    Source: Border Briefing File, Question 135
  8. 8.0 8.1 World Trigger MangaBorder Briefing File (p. 160)
  9. 9.0 9.1 World Trigger Manga Chapter 91 (p. 1)
  10. World Trigger Manga Chapter 91 (p. 8)
  11. 11.0 11.1 11.2 Daisuke Ashihara: Q134: Are there any mingling between Border agents of the same age? For instance, the 21-year-old group (Reiji, Kazama, Suwa) going out drinking together or something. A: Since the times for going up a grade and graduating and so on overlap, the connections between those of the same age are actually quite strong. Reiji, Kazama, Suwa, and Raizō often hang out eating and drinking together.
    Source: Border Briefing File, Question 134
  12. Daisuke Ashihara: Q45: Please tell us instances that shows Kazama's carelessness. A: He didn’t realize for years he was riding the city bus on child prices, he fought a postbox after Suwa got him drunk, he tried to ride Raijinmaru when no one was watching but got caught on security camera etc.
    Source: Border Briefing File, Question 45
  13. Daisuke Ashihara: Q72: Trion cubes were called "Suwa", but what does Suwa-san think of this? A: He’d feel bad for Kitora or Chika if they were to be teased for it, so it doesn’t really matter if it’s happening to him. But Kazama’s getting a beating. Is what he’s thinking.
    Source: Border Briefing File, Question 72
  14. World Trigger Manga Chapter 35 (p. 6)
  15. World Trigger Manga Chapter 71 (p. 21)
  16. 16.0 16.1 World Trigger Manga Chapter 131 (p. 15)
  17. 17.0 17.1 World Trigger Manga Chapter 87 (p. 11)
  18. 18.0 18.1 World Trigger MangaBorder Briefing File (p. 158)
  19. World Trigger Manga Chapter 132 (p. 4)
  20. 20.0 20.1 World Trigger Manga Chapter 105 (p. 14-15)
  21. 21.0 21.1 21.2 World Trigger Manga Chapter 36 (p. 5)
  22. World Trigger Manga Chapter 89 (p. 18)
  23. World Trigger Manga Chapter 88 (p. 5-6)
  24. World Trigger Manga Chapter 37 (p. 2)
  25. World Trigger Manga Chapter 65 (p. 14)
  26. World Trigger Manga Chapter 65 (p. 16)
  27. World Trigger Manga Chapter 66 (p. 2)
  28. World Trigger Manga Chapter 87 (p. 10-11)
  29. World Trigger Manga Volume 6 (p. 68)
  30. Daisuke Ashihara: Q: Is there anyone of 18 and above who has a driver’s license for a car or a bike? A: Aside from Reiji who has already driven in the story, it seems Fuyushima, Azuma, Suwa, Tsutsumi, Kako, and Kakizaki have normal driver’s licenses. The top brass and Sawamura have licenses too. Tachikawa doesn’t as you might expect. Zoe has a motorbike license, and Kage and Tōma have motorized bicycle licenses. It seems Arafune and Hokari want motorbike licenses too.
    Source: Question Corner 15, Volume 20
  31. Volume 6 Character Profiles


e d vBorder
Commander in Chief Masamune Kido
Administration Eizō NetsukiKatsumi KarasawaKyōko SawamuraMasafumi ShinodaMotokichi KinutaTakumi Rindō
General Staff Mikhael CroninRaizō TerashimaSeiji Mizunuma
S-Rank Tsukihiko Amō
A-Rank Ai KitoraAsumi AmakuraFutaba KuroeHayato UnoIsami TōmaJun ArashiyamaKazuma SatomiKei TachikawaKen SatoriKirie KonamiKōhei IzumiKyōsuke KarasumaMai KitagawaMitsuru TokiedaNozomi KakoReiji KizakiRyō UtagawaRyūji SaekiShinji FuyushimaShirō KikuchiharaShōhei KoderaShūji MiwaShun MidorikawaSōya KazamaTakaaki KatagiriTakeru YuigaTōichirō MomozonoTōru NarasakaYōsuke YoneyaYūichi JinYukimaru Ichijō
B-Rank Atsushi HokariChika AmatoriDaichi TsutsumiFumika TeruyaHanao TsukimiHaruaki AzumaHidetaka KitazoeHiro KitazoeHisato Sasamori • Hitoshi Matsushiro • HyuseItsuki FujisawaKai MinamisawaKazuaki ŌjiKazuki KurauchiKazuto TonookaKeizō MamiyaKō MurakamiKōji OkiKōtarō SuwaKotarō TomoeKuniharu KakizakiMakoto Chano • Mamoru Tokiwa • Masakuni Hakoda • Masataka NinomiyaMasato KageuraMinoru HataMitsuya KoinumaNoboru KoaraiOsamu MikumoRei NasuRokurō Wakamura • Ryōgo Funabashi • Satoru Hayakawa • Satoshi Mizukami • Seiji Marui • Shinnosuke Tsuji • Shō Motegi • Sumiharu InukaiTaichi Betsuyaku • Takahiro Ebina • Takuma YubaTatsuhito IkomaTatsuya KurumaTetsuji Arafune • Tokiya Saitō • Tsuneyuki Okudera • Waka Utsunomiya • Wataru UrushimaYōko Katori • Yoshinobu Kera • Yoshito HanzakiYūichirō YoshizatoYukari Obishima • Yukito Otokawa • Yūko KumagaiYūma KugaYūta MiuraYutaka Kashio • Yūya Tsuchisaki • Yuzuru Ema
C-Rank Fumifumi SaotomeHidehide HinoeIzuho NatsumeTeruteru Kōda
Operators Aki HiyamiAn KobayakawaAoi Kusumoto • Asami Taya • Asuka Asagiri • Ayumu Hatori • Hana SomeiHaruka AyatsujiHaya Kittaka • Hazuki Nanao • Hikari NireKaho MikamiKarin YuitsukaMadoka UiMako HitomiMaori HosoiMegumi TokuraNono FujimaruRen TsukimiRika RokutaRin KagamiRisa MakiRui OsanoSaki KusakabeSakurako TaketomiSayoko ShikiShiori UsamiYuka KonYuri RindōYuu Kunichika
Former Border Agents Akane HiuraMirai HatoharaShin KazamaSōichi MogamiTadaomi KandaYūgo Kuga
Affiliated Personel RaijinmaruReplicaRinji AmatoriRuka ShinodaYōtarō Rindō
Units Arafune UnitArashiyama UnitAzuma UnitChano UnitEbina UnitFuyushima UnitHayakawa UnitIkoma UnitKageura UnitKakizaki UnitKako UnitKatagiri UnitKatori UnitKazama UnitKizaki UnitKuruma UnitKusakabe UnitKōda UnitMamiya UnitMatsushiro UnitMikumo UnitMiwa UnitNasu UnitNinomiya UnitŌji UnitSuwa UnitTachikawa UnitTokiwa UnitUrushima UnitYoshizato UnitYuba Unit
Branches Hayanuma Branch • Hisama Branch • Suzunari BranchTamakoma Branch • Wataayu Branch • Yumite District Branch
Factions Kido Faction • Shinoda Faction • Tamakoma Branch
Triggers AsteroidBagworm • Bagworm Tag • Bail OutChameleon • Cobra • ConnectorDummy BeaconEaglet • Enhanced Radar • EscudoFūjinFull ArmsFull AttackGeistGimletGrasshopperHornetHoundIbisIdatenKogetsu (Spear/Gen'yō/Senkū) • Lead BulletLightning • Makō • MeteorRadarRaygust (Shield/Thruster) • RingSalamanderScorpionShield (Anchor Mode/Full Guard) • Silencer • SōgetsuSpiderStarmakerSwitchboxTeleporter • Timer • TomahawkTrion BodyViper