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    The four protagonists with approximate projections of their trion levels.

    Trion (トリオン, Torion ?) is a biological power source, or energy[1], that resides within every living human, and possibly in other life forms as well.[2] This energy provides power for a Trigger's various abilities and functions.[3]

    Description[edit | edit source]

    Trion is produced by an invisible organ, better known as the Trion Gland (トリオン ()(かん), Torion Kikan Lit. Trion Organ ?).[1] It is not known in the human world, but every human possesses this organ, located next to their heart.[4] Every human's trion gland has different trion values.[3] The trion gland can increase trion production if exerted regularly, much like a muscle[4][5], and it will likewise benefit from a good diet and rest.[5][4] After the age of 20, however, it stops developing[6] and starts to decay if not exerted.[7] this leads to countries recruiting children due to how their gland can still grow[6], However places like Border allow for older applicants if they have the Trion[8], while in the neighborhood, it is common for people in their 30s and 40s to still be on the frontlines[9], with combatants at Viza's age are rarer.[9] Additionally, How much trion a person isn't related to genetics[10][11], meaning someone with low amounts of trion can give birth to a person with decent[10] to Black Trigger[12] levels of trion. this leads to countries to look even among unremarkable families for recruitment[10], however criminal history can still play a factor.[13] A high trion value can allow an individual to develop one[14] or, in exceptionally rare cases, multiple Side Effects[15], and plays a crucial part in the creation of a Black Trigger.[16]

    The functions of the trion gland are directly connected to a Trigger's power.[3] If the same Trigger is used by a different person, differences will appear concerning their trion values.[3] While using a Trigger, the user will go into a Trion Body, which is their body made fully of trion.[17] Their normal body goes into the Trigger holder.[17][18] They squirt out gas instead of blood (green and later dark grey gas in the anime).[19] If the trion body is destroyed, the body will revert to their normal body[20], Trion bodies amongst A-Rank, and B-Rank will initiate bail out[20], upon completion will result in transformation to their real body.[21] C-Ranks[22], Black Trigger users[23] and Neighbors[24] (with the exception of Galopoula[25]) lack the Bail Out process and as such are immediately transformed on the spot.[19][26][27][28] Yuma is a rare case of already being in a trion body before transformation[29] so he transforms back into his original Trion Body.[30] The regeneration time is proportional to the person's trion value; the greater the trion value, the longer the regeneration time.[31]

    Aftokrator's Trion Receptors increase both the amount of trion an individual has and its quality as they grow.[32]

    Trion Values[edit | edit source]

    Border quantifies the trion of its personnel and neighbors using a value of 1[33][34] or higher, but it is unknown how other countries do it, however Replica has shown the ability to show visualizations of a person's Trion levels.[35][36] Aspiring combatants with low trion tend to be rejected from Border[13], though they are still able to work for Border in other roles, such as Operator or Engineer.[37] Border combatants' trion typically ranges from 4[38][39][40] to 9[41][42][43][44] when using normal triggers, though there are exceptions. For example, Chika Amatori has a trion value of 38[15], which is the highest known one in Border. On the other hand, Osamu Mikumo only has a trion value of 2[45], which is the lowest known one among Border's combatants. However, there are operators with a trion value of only 1.[33][34] Black Triggers provide a significant boost in trion to their users, as shown with Yūichi Jin, who has a trion value of 7[46] when using normal triggers and a trion value of 37 when using Fujin;[47] This is due to how the trion used to make the black trigger is condensed.[48] Additionally, Aftokrator's Trion Receptors increases the amount of trion an individual has as they grow.[32] going by border's numeral system, Hyuse (who has the lowest trion among Hyrein's Expedition Force[49]) has a value of 16[50], whereas Masataka Ninomiya who had the highest value in Border before Chika's enlistment[51] has a 14.[52] If Chika is factored in, All 4 of the expedition force's black trigger users all have higher trion values[53] than chika's 38[15], however she has higher trion than the horn trigger users.[54]

    Replica's Visualization of Osamu's trion level

    Border Triggers[edit | edit source]

    Border triggers are very malleable and vary drastically in quality depending on the trion of the user. Even on the lower end of the average, all of Border's triggers are of an acceptable quality to use during battle. With more trion at your disposal, some incredible things can be achieved due to the triggers malleable nature. Some triggers require more trion to be sustainable for longer.

    Attacker Triggers[edit | edit source]

    Attacker triggers are split into power, durability and weight. higher trion results in stronger and more durable weapons as shown with Osamu's Raygust completely breaking to Egret fire[55] while Ko's can survive, taking heavy damage, Gattlin's canon[56][57]

    Gunner/Shooter Triggers[edit | edit source]

    A bullet's trion is divided percentwise into it's range, speed and power. Even with the same divisions, differences will be seen between varied trion users as they each have a different initial value of trion invested into the bullet prior to dividing into parameters. Gunners have three extra values; Rate of fire, Weight of firearm and Magazine size. Similar to above, a higher trion agent has the benefit of sacrificing less to achieve the same or more as a lower trion agent.

    Sniper Triggers[edit | edit source]

    Sniper bullets lack the complexity of normal bullets but still have a singular parameter that scales with the trion of the user.

    Trapper triggers[edit | edit source]

    The Switchbox is a trigger that only high trion agents can utilize effectively due to its higher than normal consumption.

    Optional Triggers[edit | edit source]

    None of Chameleon's attributes are directly affected by trion but, due to its taxing trion consumption, only with higher trion can you use it for extended periods of time.

    Dummy Beacon's active time can be affected by the volume of trion invested into them, more disposable trion can result in longer lasting Beacons and more of them.

    With Chika's level of trion it is stated she can output one hundred times the number of Spider wires than Osamu in one go.[58]

    The weight of a Lead Bullet isn't largely variable with exceptions including Miwa's custom (which cost more to produce) and Ibis. The speed and range of a Lead Bullet is drastically slower but with higher trion this downside can be circumvented with Lightning.

    Defence Triggers[edit | edit source]

    A defence trigger's durability is usually dependant on whether it's stationary and proportional to its surface area. These limitations can be slightly circumvented by having a larger trion pool to draw from. Chika's fixed shield has been shown to be capable of protecting her from a self inflicted meteor (that has been shown to be half the size of a mall and excessively destructive)[59] whereas Daichi's is able to be shot through with Akane's Ibis (Though this is with assistance of a smaller meteor and a few viper rounds)[60].

    • Escudo's range is able to be amplified with higher trion users[61].

    Beyond Normal Triggers[edit | edit source]

    Side Effects are currently only attributed to people with a higher than normal trion. This is most likely due to the way Side Effects are developed, an particular interaction the brain has with trion that appears more likely the higher higher trion you have. The lowest value of trion a Side Effect holder current has is 7.

    Black Triggers are stated to be more likely constructed from people with Side Effects and those with higher trion values. The value needed to create one is unknown.

    Bullet Forms[edit | edit source]

    When Shooters use their gunner trigger, with the exception of Kako[62], always appears in the shape of a cube which can be split.[63][64][65][66] Most Agents choose to split the cube into either 8[67][68][69], 9[70], 27[71][72][73][74][75], or 64[76][77] parts or choose to not split the cube at all[78][79], however it has been shown that pyramids[63][64] and Tetrahedra[65][66] are also possible, however it is an advanced technique for people who want to control the number and power of the bullets in detail.[80]

    It should also be noted that Nozomi Kako has a custom Hound[43] which appears as a Sphere which from which smaller sphere are emitted.[62]

    Trion Quality[edit | edit source]

    Trion differs among individuals also due to its quality.[32] How exactly this property affects it is unclear, but it has been suggested that higher-quality trion makes trion manipulation easier[81], which in turn improves the accuracy of one's control over their Triggers.[81]

    Trivia[edit | edit source]

    • Trion capacity can be inherited, but it isn't always the case.[11]
    • It is currently believed that it is impossible to remove the trion gland without killing the person[82], however it was stated removing black triggers might be possible.[82]
    • If Chika activated Fujin, she would have about 5-60 strands.[83]

    References[edit | edit source]

    1. 1.0 1.1 World Trigger MangaChapter 5 (p. 15)
    2. Daisuke Ashihara: Q: Does trion or trion gland exist in living beings other than humans?
      A: It might, but to use triggers, "clearly radiating the will to activate the trigger" is necessary, so it seems difficult to make a dog or cat use a trigger.
      Source: Border Briefing File, Page 308, Question 176
    3. 3.0 3.1 3.2 3.3 World Trigger MangaChapter 5 (p. 16)
    4. 4.0 4.1 4.2 World Trigger MangaBorder Briefing File (p. 206)
    5. 5.0 5.1 Daisuke Ashihara: Q: Can the Trion Gland be strengthened with training?
      Does Trion get replenished with time or sleep?
      A: Just like lung capacity and muscle strength, it can be improved somewhat, and does recover with nutrition and rest.
      Source: Volume 5, Question Corner 1
    6. 6.0 6.1 Daisuke Ashihara: Q: Why are all Border agents young?
      A: The biggest reason is that the younger you are, the more your Trion Gland can grow. Agents over age 20 whose growth has stopped often go into administration (like Sawamura).
      Source: Volume 5, Question Corner 1
    7. Daisuke Ashihara: Q: Does the Trion gland decay with age?
      A: It seems it slowly decays if it is not used. Using it maintains it to a certain extent.
      Source: Volume 10, Question Corner 9
    8. Daisuke Ashihara: Q: Is there an age limit to applying to Border?
      A: There isn't a strict age limit as long as you have Trion, but you're more likely to be hired the younger you are because the Trion Gland can grow more.
      Source: Volume 6, Question Corner 3
    9. 9.0 9.1 Daisuke Ashihara: Q: Old man Viza and Captain Gatlin are still fighting on the front lines despite their advanced age. In the neighborhood, is it normal for people in their 30s or 40s or older to keep fighting as long as they continue to use their Trion gland?
      A: Viza is a rather rare case, but it is common for people in their 30s and 40s to still be on the front line.
      Source: Volume 27 - Question Corner 25
    10. 10.0 10.1 10.2 World Trigger MangaChapter 120 (p. 1)
    11. 11.0 11.1 Daisuke Ashihara: Q: Is Trion capacity inherited?
      A: Sometimes, but not necessarily. For example, Chika's parents don't have high Trion.
      Source: Volume 7, Question Corner 4
    12. World Trigger MangaChapter 24 (p. 11)
    13. 13.0 13.1 Daisuke Ashihara: Q: Are there any requirements, like fitness tests, for applying to Border?
      A: There are basic fitness tests, basic achievement tests, and an interview. Other than having low Trion levels or a criminal record, you won't get rejected (Osamu was nearly rejected).
      Source: Volume 5, Question Corner 1
    14. World Trigger MangaChapter 11 (p. 2)
    15. 15.0 15.1 15.2 World Trigger MangaBorder Briefing File (p. 148)
    16. World Trigger Manga and Anime Vol. 2 Chapter 16 (p. 7) and Episode 8.
    17. 17.0 17.1 World Trigger MangaChapter 8 (p. 9)
    18. Daisuke Ashihara: Q: Where is the physical body while the Trion body is activated?
      A: Stored where the Trion body was, inside the Trigger Holder.
      Source: Volume 7, Question Corner 4
    19. 19.0 19.1 World Trigger Manga and Anime Vol. 1 Chapter 4 (p. 15-16) and Episode 3.
    20. 20.0 20.1 World Trigger MangaBorder Briefing File (p. 207)
    21. World Trigger MangaChapter 45 (p. 10-11)
    22. World Trigger MangaChapter 84 (p. 9)
    23. World Trigger MangaChapter 28 (p. 2)
    24. World Trigger MangaChapter 134 (p. 9) Border made bail out so neighbors by default shouldn't have bail out
    25. World Trigger MangaChapter 134 (p. 7-9)
    26. World Trigger MangaChapter 61 (p. 1-2)
    27. World Trigger MangaChapter 72 (p. 1)
    28. World Trigger MangaChapter 79 (p. 1-2)
    29. World Trigger MangaChapter 79 (p. 1)
    30. World Trigger MangaChapter 78 (p. 17-19)
    31. Daisuke Ashihara: Q: Are there any differences in the amount of time it takes a person to recreate a Trion Body?
      A: The more Trion a person has (= the more Trion that gets used in battle) the bigger the cost of constructing a Trion Body, so recreating it will take more time. Chika takes a lot of time but Osamu can return to battle fairly quickly (in about 1~2 hours time).
      Source: Volume 13, Question Corner 10
    32. 32.0 32.1 32.2 World Trigger MangaChapter 54 (p. 3)
    33. 33.0 33.1 World Trigger MangaBorder Briefing File (p. 43)
    34. 34.0 34.1 World Trigger MangaBorder Briefing File (p. 96)
    35. World Trigger MangaChapter 13 (p. 8)
    36. World Trigger MangaChapter 13 (p. 15)
    37. World Trigger MangaChapter 82 (p. 14)
    38. World Trigger MangaBorder Briefing File (p. 66)
    39. World Trigger MangaBorder Briefing File (p. 80)
    40. World Trigger MangaBorder Briefing File (p. 134)
    41. World Trigger MangaBorder Briefing File (p. 29)
    42. World Trigger MangaBorder Briefing File (p. 36)
    43. 43.0 43.1 World Trigger MangaBorder Briefing File (p. 72)
    44. World Trigger MangaBorder Briefing File (p. 116)
    45. World Trigger MangaBorder Briefing File (p. 140)
    46. World Trigger MangaBorder Briefing File (p. 98)
    47. World Trigger MangaBorder Briefing File (p. 202)
    48. Daisuke Ashihara: Q: Why does a Trion user's total trion increase when a Black Trigger is activated?
      A: The current theory is that the Black Trigger's creator's own stats override the current user's stats. Sometimes output is even higher than the creator's typical levels, perpahs becuase creating a Black Trigger involves pouring in and condensing every last drop of one's own Trion.
      Source: Volume 25, Question Corner 21
    49. World Trigger MangaBorder Briefing File (p. 236-241)
    50. World Trigger MangaBorder Briefing File (p. 239)
    51. World Trigger MangaVol. 13 Character Profile
    52. World Trigger MangaBorder Briefing File (p. 104)
    53. World Trigger MangaBorder Briefing File (p. 236-238, 240)
    54. World Trigger MangaBorder Briefing File (p. 239, 241)
    55. World Trigger MangaChapter 88 (p. 185)World Trigger Manga Vol. 10 (p. 185)
    56. World Trigger MangaChapter 128 (p. 71)World Trigger Manga Vol. 15 (p. 71)
    57. World Trigger MangaChapter 134 (p. 14)World Trigger Manga Vol. 16 (p. 14)
    58. Daisuke Ashihara: Q: What would happen if Chika used Spider? Could she make a giant spider web all at once?
      A: She could bust out one hundred times as many wires as Osamu in one go, but they'd be so dense they'd immobilize her, and they'd end up stabbing her and her allies.
      Source: Volume 20, Question Corner 16
    59. World Trigger MangaChapter 137 (p. 88-89)World Trigger Manga Vol. 20 (p. 88-89)
    60. World Trigger MangaChapter 198 (p. 54)World Trigger Manga Vol. 23 (p. 54)
    61. World Trigger MangaChapter 174 (p. 99)World Trigger Manga Vol. 20 (p. 99)
    62. 62.0 62.1 World Trigger Manga and Anime Vol. 15 Chapter 127 (p. 4) and Episode 75.
    63. 63.0 63.1 World Trigger Manga and Anime Vol. 13 Chapter 111 (p. 10) and Episode 68.
    64. 64.0 64.1 World Trigger Manga and Anime Vol. 13 Chapter 113 (p. 18) and Episode 69.
    65. 65.0 65.1 World Trigger Manga and Anime Vol. 21 Chapter 185 (p. 10-11) and Episode 96.
    66. 66.0 66.1 World Trigger Manga and Anime Vol. 22 Chapter 192 (p. 5) and Episode 98.
    67. World Trigger Manga and Anime Vol. 12 Chapter 100 (p. 10) and Episode 46.
    68. World Trigger Manga and Anime Vol. 12 Chapter 102 (p. 15) and Episode 47.
    69. World Trigger Manga and Anime Vol. 13 Chapter 112 (p. 6-7) and Episode 68.
    70. World Trigger Manga and Anime Vol. 11 Chapter 91 (p. 8) and Episode 41.
    71. World Trigger Manga and Anime Vol. 5 Chapter 35 (p. 12) and Episode 18.
    72. World Trigger Manga and Anime Vol. 6 Chapter 50 (p. 11) and Episode 24.
    73. World Trigger Manga and Anime Vol. 12 Chapter 102 (p. 12) and Episode 47.
    74. World Trigger Manga and Anime Vol. 16 Chapter 138 (p. 7-9) and Episode 78.
    75. World Trigger Manga and Anime Vol. 16 Chapter 138 (p. 15) and Episode 78.
    76. World Trigger MangaChapter 96 (p. 18)
    77. World Trigger MangaChapter 156 (p. 11)
    78. World Trigger Manga and Anime Vol. 8 Chapter 67 (p. 10) and Episode 30.
    79. World Trigger Manga and Anime Vol. 5 Chapter 36 (p. 16-17) and Episode 18.
    80. Daisuke Ashihara: Q: Why do Shooter cubes have different shapes like squares and spheres?
      A: Probably because they want to control the number and power of the bullets in detail. It seems to be a very advanced technique to divide the cube into shapes other than more cubes. Izumi could likely do it too, but he isn't so particular about the shape.
      Source: Volume 25, Question Corner 22
    81. 81.0 81.1 World Trigger MangaChapter 162 (p. 15)
    82. 82.0 82.1 Daisuke Ashihara: Q: If someone tries removing the trion gland from a body, wouldn't they run into a wall of meat and bone? Is it possible to rip out the trion gland without killing the subject?
      A: It's believed to be impossible with current technology. But surgically removing Black triggers might be possible?
      Source: Volume 20, Question Corner 16
    83. Daisuke Ashihara: Q: If Chika could activate Fūjin, how many strands of light can she manifest?
      A: About 50~60 strands it seems. It probably won't look like a sword anymore.
      Source: Border Briefing File, Page 289, Question 12
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