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    (Redirected from Side Effects)
    Border's Side Effect Ranking.

    Side Effects (副作用(サイド エフェクト), Saido Efekuto ?) are extensions of human abilities which manifest in people with high amounts of Trion due to the effect of trion on the brain and sensory organs.[1][2]

    There are two types of Side Effect Holders, those who have the ability from birth, and those who later acquired it due to an external factor, however the specific condition to manifest one is unknown, and are rare overall.[1]

    Border has a makeshift ranking system depending on the rarity, but the rank doesn't equal strength[3], for example Kikuchihara was able to improve Kazama Squad thanks to his enhanced hearing despite being the lowest rank of C.[3]

    • S - Extrasensory Perception ((ちょう) (かん)(かく), Chō Kankaku ?), like Jin's Foresight.[3]
    • A - Superhuman Ability ((ちょう) ()(のう), Chō Ginō ?), like Yōtarō's ability to talk to animals.[3]
    • B - Special Constitution ((とく)(しゅ) (たい)(しつ), Tokushu Taishitsu ?), like Kageura's Emotion Perception[3] and Murakami's Enhanced Sleep Learning.[3]
    • C - Enhanced Senses ((きょう)() ()(かん), Kyōka Gokan ?), like Kikuchihara's Enhanced Hearing.[3]

    Usage[edit source]

    Due to the nature of Side Effects, many holders use their ability in combat, but there are multiple cases where it can be used outside of combat[3], although there are cases where the holder use their ability either purposely or accidentally without knowing it is a side effect.[3][4]

    Side Effect Holders[edit source]

    Each Side Effect name links to the respective character's ability page which has more details
    • Tsukihiko Amō - Name Unknown ((しょう)(さい)()(めい), Shōsai Fumei Lit. Details Unknown ?), but it lets him View others' fighting ability as colors.[5][6]
    • Yūichi Jin - Foresight (()(らい)(), Mirai-Shi Lit. Future Sight ?), which lets him see the future of those before him[7][8] by having a window open in his mind that he can't turn off[9], but can choose to ignore[9], this also lets him track future branching events.[9]
    Jin's Side Effect
    • Shirō Kikuchihara - Enhanced hearing ((きょう)()(ちょう)(かく), Kyōka Chōkaku ?), which not only increases his hearing by 5 or 6 times[10][11], it increases the precision by a lot.[10][12]
    • Hayato Uno - Precise Bodily Control ((せい)(みつ) (しん)(たい) (ぞう)(), Seimitsu Shintai Zousa ?), lets Uno move while sniping[13]; however, he couldn't replicate Satori's Twin Snipe.[13]
    • Yūma Kuga and Yūgo Kuga - Seeing Through Lies ((うそ)()(), Uso wo Minuku ?), which lets him see the lies of others[14][15] through a visual cue.[16]
    • Chika Amatori: Sensing enemies and Erasing Presence ((てき) (かん)()()(はい)(), Teki Kanchi/Kehai wo Kesu ?), Chika is the only known person who has 2 side effects, the latter lets her erase her presence, at the cost of needing to focus heavily[17][18], while the former lets her detect neighbors and trion soldiers[17][19], but not much is known about both side effects.
    • Masato Kageura - Emotion Perception ((かん)(じょう)(じゅ)(しん) (たい)(しつ), Kanjōjushin Taishitsu Lit. Emotion Reception Constitution ?), which lets him receive emotions aimed at him from other people.[20][21]
    • Kō Murakami - Enhanced Sleep Learning ((きょう)()(すい)(みん)()(おく), Kyōka Suimin Kioku Lit. Enhanced Sleep Memory ?), which enhances stabilization and consolidation of memory during sleep.[22][23]
    • Yōtarō Rindō - Talking to animals ((どう)(ぶつ)との()()()(つう), Dōbutsu to no Ishisotsū Lit. Communicating with Animals ?) which lets him talk to animals[24][25], however how intelligence of the animal will determine the response[26], additionally if he issues a command, the animal doesn't have to obey.[25][24]
    • Yomi - Perfect Parallel Processing ((かん)(ぜん)(へい)(れつ)(どう)()()(こう), Kanzen Heiretsu Dōji Shikō ?), improves his parallel processing ability to the point where Kinuta thought there was two Operators instead of one[27], additionally he was described as having "twice the processing power of the average Reghi".[28]

    Theme[edit source]

    A recurring theme in the series sees Side Effects contributing to their possessor's misery:

    • Chika's Side Effects allowed her to escape capture at the hands of Trion Soldiers for years[29][30], and are thus indirectly responsible for her feelings of guilt after her friend was abducted.[29][30]
    • Following his father's death, Yūma's Side Effect allowed him to see through the empty platitudes and attempts at manipulation of the people who surrounded him[31], some of whom would have preferred his father to survive rather than him.[31]
    • Jin's ability to see the future comes with great responsibility, as he may be forced with the choice of letting someone be injured or even die to prevent a worse outcome.[32]
    • Kikuchihara was mocked for the supposed inutility of his Side Effect[33], with it causing him to overhear himself being mocked.[33]
    • Murakami lost friends due to his Side Effect allowing him to surpass them in their favorite activities in a short time, causing the group to disintegrate.[34]
    • Kageura is not only privy to others' negative feelings towards him[21], but the prickling sensation provoked by his Side Effect is all the more unpleasant if the emotion directed at him is a negative one.[21]

    Trivia[edit source]

    • It is possible for two people to have the same Side Effect[35], however due to the rarity of them, it doesn't really happen.[35]
    • one of Jin's main reasons for losing is getting too absorbed in reading the future[36], and neglecting the present.[36]
    • Kageura wears a mask to not only hide his teeth[37], but also to cover up his skin so his Side Effect doesn't take too much of a toll on him.[37]
    • Kikuchihara became an Attacker because getting close to the enemy makes better use of his Side Effect.[39]
    • Murakami spends some time sleeping without his Side Effect activating[40] which makes it so it doesn't tire him.[40]

    References[edit source]

    1. 1.0 1.1 World Trigger MangaBorder Briefing File (p. 228)
    2. World Trigger Manga and Anime Vol. 2 Chapter 11 (p. 2) and Episode 6.
    3. 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 World Trigger MangaBorder Briefing File (p. 229)
    4. Daisuke Ashihara: Q: Does a Side Effect ever manifest itself late in life?
      A.Except for the very rare case of "inheriting it together with a Black Trigger" like with Yūma, there is no record of a clear late manifestation of a Side Effect at that point.
      It is often the case that a person has lived their life without realizing that they have a Side Effect, and later learn about it.
      Source: Twitter Q&A January 2024: Day 2 Question 4
    5. World Trigger MangaBorder Briefing File (p. 36)
    6. World Trigger Manga and Anime Vol. 15 Chapter 125 (p. 11) and Episode 74.
    7. World Trigger MangaBorder Briefing File (p. 98)
    8. World Trigger Manga and Anime Vol. 2 Chapter 11 (p. 9-10) and Episode 6.
    9. 9.0 9.1 9.2 Daisuke Ashihara: Q: How does Jin's Side Effect work? Can he turn it ON or OFF?
      A: It's like having a new window open up in your vision (mind), you can't turn it off, but you can consciously choose to ignore it. The person you saw once gets registered in the brain channel for a while and seems to allow tracking future branching events during it.
      Source: Volume 26, Question Corner 23
    10. 10.0 10.1 World Trigger MangaBorder Briefing File (p. 54)
    11. World Trigger Manga and Anime Vol. 7 Chapter 56 (p. 2) and Episode 26.
    12. World Trigger Manga and Anime Vol. 7 Chapter 56 (p. 10) and Episode 26.
    13. 13.0 13.1 World Trigger MangaVol. 24 Character Profile
    14. World Trigger MangaBorder Briefing File (p. 144)
    15. World Trigger Manga and Anime Vol. 3 Chapter 20 (p. 16) and Episode 11.
    16. Daisuke Ashihara: Q: Can Yuma's side effect help him detect lies in writing too? Like in books or text messages? Will Yuma's side effect pick up on lies that the speaker doesn't even realize are lies? How does Yuma's side effect tell him when something is a lie? (Does he hear the person speaking in slow motion, or does he get prickling tingles like Kage?)
      A: When a person is lying, Yuma's side effect makes it look like black smoke is pouring out of their mouth. The subtle changes in the liar's voice transform into a visual cue that helps Yuma see through the lie. So no, I don't think his side effect would work if the person didn't know they were lying or if he were reading the lie in a text.
      Source: Volume 23, Question Corner 18
    17. 17.0 17.1 World Trigger MangaBorder Briefing File (p. 148)
    18. World Trigger Manga and Anime Vol. 2 Chapter 12 (p. 10) and Episode 6.
    19. World Trigger Manga and Anime Vol. 2 Chapter 12 (p. 6-7) and Episode 6.
    20. World Trigger MangaBorder Briefing File (p. 112)
    21. 21.0 21.1 21.2 World Trigger Manga and Anime Vol. 13 Chapter 109 (p. 7) and Episode 67.
    22. World Trigger MangaBorder Briefing File (p. 126)
    23. World Trigger Manga and Anime Vol. 11 Chapter 94 (p. 2) and Episode 43.
    24. 24.0 24.1 World Trigger MangaBorder Briefing File (p. 198)
    25. 25.0 25.1 World Trigger MangaVol. 3 Character Profile
    26. Daisuke Ashihara: Q: How does Yōtarō talk to animals?
      A: It depends on the animal's level of intelligence. He can get "Yes", "No", "Okay", "No way" from any animal. Basically it's Yōtarō speaking to them and then getting a response.
      Source: Border Briefing File, Page 291, Question 28
    27. World Trigger Manga and Anime Vol. 15 Chapter 129 (p. 15) and Episode 76.
    28. World Trigger MangaVol. 15 Character Profile
    29. 29.0 29.1 World Trigger Manga and Anime Vol. 2 Chapter 14 (p. 10-13) and Episode 7.
    30. 30.0 30.1 World Trigger Manga and Anime Vol. 21 Chapter 179 (p. 10-12) and Episode 93.
    31. 31.0 31.1 World Trigger Manga and Anime Vol. 3 Chapter 20 (p. 15-16) and Episode 11.
    32. World Trigger Manga and Anime Vol. 14 Chapter 116 (p. 9-12) and Episode 70.
    33. 33.0 33.1 World Trigger Manga and Anime Vol. 7 Chapter 56 (p. 1-2) and Episode 26.
    34. World Trigger Manga and Anime Vol. 11 Chapter 95 (p. 2-3) and Episode 43.
    35. 35.0 35.1 Daisuke Ashihara: Q: Are there any cases of different people with the same Side Effect?
      A: It is possible, but people with Side Effects are rare in general, so you don't really meet people with the same ability.  
      Source: Border Briefing File, Page 306, Question 163
    36. 36.0 36.1 Daisuke Ashihara: Q: Does Jin use his Side Effect in solo matches? If he does, then what is the cause when he loses?
      A: It seems he uses it against A-rank agents. He used it actively in his past matches with Tachikawa too. A common case of him losing has him getting absorbed in reading the future and neglecting the present as the main factor.
      Source: Volume 20, Question Corner 15
    37. 37.0 37.1 Daisuke Ashihara: Q: Does Kageura wear a mask in order to hide his sharp spiky teeth?
      A: There's that, yes, but it's also to cover up more skin, which keeps his side effect from taking too much of a toll on him.
      Source: Volume 20, Question Corner 16
    38. Daisuke Ashihara: Q: Does Kikuchihara growing out his hair have anything to do with his Side Effect?
      A: It does. He grows out his hair because he gets the impression that he isn't picking up unnecessary sounds this way.
      Source: Border Briefing File, Page 293, Question 49
    39. Daisuke Ashihara: Q: Kikuchihara is an arts-type and seems pretty weak, so why did he become an Attacker?
      A: Because being close to the target to a certain extent makes better use of the Enhanced Hearing Side Effect.
      Source: Border Briefing File, Page 293, Question 51
    40. 40.0 40.1 Daisuke Ashihara: Q: Does Murakami learn every time he goes to sleep? I'm worried it will tire him.
      A. It seems that when he sleeps he usually spends some of it without his Side Effect activating, so I think he'll be fine.
      Source: Twitter Q&A August 2023: Day 3 Question 2
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