The article is a list of characters that appear in the action sci-fi manga and anime World Trigger by Daisuke Ashihara.
Main characters
A humanoid Neighbor from the Neighborhood, who is laid-back and unknowledgeable of Japanese customs. When he was 11 years old, he and his father were involved in a war in the Neighborhood and lent their power to Raymond, an old friend of Yūgo's. Yūma disobeyed Yūgo, who had told him not to follow him, by sneaking into battle, causing him to be severely injured. Yūgo sacrificed himself to create a to prolong Yūma's life, sealing his dying body in a ring that also holds the Black Trigger. His guardian, Replica, told him to go to the human world to see if Border could find a cure for his condition; however, he wants to bring Yūgo back by removing the Black Trigger from his body, even though it is keeping him alive. He eventually officially joins Border as a C-Rank attacker in Tamakoma-2. In the anime, he is known as the , and the Kōda Squad calls him the "White Nightmare" because of his white hair and ferocity in battle. In Season 2, Ōji gives him the nickname of "Cougar". He is a Speed Based Attacker that uses Scorpion to fight in Rank Wars. After receiving the Black Trigger, he inherited a Side Effect which enables him to determine when a person is lying.
A 15-year-old boy and a Border agent with low Trion level, who befriends Yūma after he transfers to his school and rescues him from a Neighbor attack. He is later promoted into B-Rank Border and becomes a Shooter and the leader of , also known as ; he is usually referred as "Four Eyes" by those outside Tamakoma-2. He becomes Chika's protector after her older brother and his tutor mysteriously disappeared and joins Border to be better able to protect her, but the examiner instead suggests that he become an Engineer or Operator due to his low Trion. Unable to accept this, he tries to infiltrate Border's headquarters and negotiate with them, but after Jin saves him from a Bamster, he convinces Border to accept Osamu as a C-Rank trainee.
A 14-year-old girl with abnormally high Trion levels, which "attracts" Trion Soldiers towards her, and who joined Border as a C-Rank Sniper in Tamakoma-2 seeking to save her brother Rinji and her friend after Neighbors captured them. She purposely distances herself from others out of fear that those close to her will be hurt. She has two side effects, one that allows her to sense the presence of approaching enemies, and one that hides her presence. Izumi refers to her as , due to her huge amount of Trion, andin Season 2, she becomes known as "Tamakoma's Cannon".
A 19-year-old man and an A-Rank Solo Attacker, who was originally S-Rank, at Border who possesses the ability to see the future as a result of his Side Effect. He is a self-proclaimed "Talented Elite", and is skilled at formulating strategies in battle. Although his mother was killed by the Neighbors, he does not hate them because he has been to the Neighbor World and knows that they are not all evil. He invited Yūma to join Border, and like Yūgo, his mentor sacrificed himself to create a Black Trigger, which Yūichi competed for, and later gave it away so Yūma could officially join Border and Headquarters could recognize him as a Border agent.
Yūma's guardian, whom Yūgo created to protect and teach him and has information about the countries he and Yūma visited. They told Yūma to go to the human world to see if Border could find a cure for his condition. After telling Osamu Yūma's story, they ask him to give him a new goal. Near the end of Aftokrator's invasion, Replica is severely damaged and Osamu throws them into Aftokrator's away ship and activates the emergency launch command. While this saves Osamu and Chika, Replica is unable to escape the ship. It is currently unknown if they survived.World Trigger Chapter 80
Border Tamakoma Branch is a faction of Border which believes Neighbors and humans can be friends and takes a more diplomatic approach to them. Director Rindō brought back various triggers from the neighborhood, which were analyzed by engineers and were created triggers made specifically for Tamakoma-1
The branch chief of Tamakoma Branch who has learned from past experience that not all Neighbors are enemies of humans and wants to befriend those who are good. He was a student of Yūgo, who guided and trained him when he was a newcomer to Border. Because of this, he feels indebted to Yūgo and wants to give Yūma the same treatment Yūgo gave him. He wants Yūma to join the Tamakoma branch, but Yūma initially refuses, later accepting to join as part of Tamakoma-2.
Tamakoma-1 is a Team described as being Border's strongest team. They are prohibited to participate in Border's Rank Wars, as some of their triggers are not approved by Headquarters. Two of its three combatants are all-rounders, while the third is an attacker.
A 21-year-old man and the leader of the team, who is usually calm and serious. He is experienced as an Attacker, Gunner and Sniper, and is Chika's mentor.
A 16-year-old boy who is fun-loving and cocky, but becomes serious in combat. He has mentored Osamu and Kitora.
A 17-year-old girl who is gullible, as she will believe almost anything people tell her, which people, particularly Jin, Karasuma, and later Yūma make fun of her for.
A 17-year-old girl who created the , a group of Marmods developed to help train agents, which Usami describes as each having a different "personality". She works as an operator for Jin, Tamakoma-1 and Tamakoma-2, and was the operator of Kazama Squad.
Tamakoma-2 is a new team formed by Osamu Mikumo, its leader, Yūma Kuga, Chika Amatori and later on, Hyuse. The Squad was formed because Chika wanted to join the Away Team and search for Chika's lost brother and friend, and because Replica asked Osamu to give Yūma a new goal. Osamu originally wanted Yūma to be the team captain, but Yūma only accepted joining Tamakoma Branch on the condition that Osamu was captain. Hyuse later joins the team after being marooned on the condition that Osamu brings him back to Aftokrator. They are currently No. 2 in the B-Rank ranking.
Others
The proclaimed son of Mr. Rindō, who is later revealed to be the prince of the fallen planet Aristera. Yotaro also has a pet capybara named who is revealed to be the planet's crown trigger. According to Volume 3's extras, he has the Side Effect ability to talk to animals.
Headquarters is Border's main branch, which is led by Masamune Kido and is the base for most of Border's teams.
The Leader of Border. A 42-year-old man who hates all Neighbors, and wanted to eliminate Yūma and take his Black Trigger from him. According to Shinoda, he was the one closest to Yūgo and most moved by his death, despite not showing it.
The General Manager and Commander of the Self-Defense Corps of Border, who is also known as Headquarters' Strongest Normal Trigger User. He is 33 years old and, like Rindō, was a student of Yūgo.
The Public Relations Chief. A man who easily panics and is prone to nervous outbursts and easily panics.
The Headquarters Research and Development Chief. A 48-year-old man who has a short temper, but cares deeply for children, and is said to have a daughter.
The External Affairs and Business Manager. A 33-year-old man who is calm and prefers to listen to others and believes that it is possible to negotiate with anyone as long as you know what they want.
Shinoda's subordinate and Border's Assistant Director and former Attacker. She is temperamental and annoyed by Jin's sexual harassment, and loves Shinoda.
Border Teams A-Rank Tachikawa Squad is one of Border's strongest teams, and No. 1 in the A-Rank ranking. Their emblem is a design with a crescent moon and three sword blades, diagonally arranged parallel to each other.
The leader of Tachikawa Squad and Masafumi Shinoda's apprentice, who is charismatic and cocky and a good strategist. He is Border's No. 1 agent, and is said to be better at true swordsmanship than Jin. He and Jin have been rivals for a long time, and he is excited when Jin returns to participating in the Rank Wars, as it means he gets to compete against him again.
A member of Tachikawa Squad and a reckless Shooter who thinks blowing things up is the best option, which has earned him the nickname "bullet idiot" from Yōsuke Yoneya. He tends to combine his bullets into stronger ones.
A member of Tachikawa Squad and a Gunner. He is the son of Border's biggest sponsor and is narcissistic. Despite having requested to be placed in an A-Rank Squad, which led to Masamune Kido placing him in the Tachikawa Squad, he lacks the skills needed to be an A-Rank agent.
Tachikawa Squad's operator, who likes to play video games with her teammates Izumi and Tachikawa.
Fuyushima Squad is team No. 2 in the A-Rank ranking. Their emblem is a knight chess piece with unicorn horn.
The captain of Fuyushima Squad and a Trapper. He did not participate in the raid to take Yūma's black trigger, which Tōma states is because he had sea-sickness.
A Sniper and the No. 1 Sniper of Border, who was Azuma's student. He is arrogant and likes teasing Narasaka, the No.# 02 Sniper, but is friendly and able to recognize strong opponents.
Kazama Squad is team No. 3 in the A-Rank ranking, who rose in the A-Rank ranking thanks to Kikuchihara's side effect. Their emblem is a crossed-out eye.
The leader of Kazama Squad. A 21-year-old Attacker who is serious and stoic.
An All-Rounder from Kazama Squad. Unlike the stoic Kazama and the foul-mouthed Kikuchihara, he is gentle and friendly.
An Attacker from Kazama Squad. He is a foul-mouthed young boy with little respect for those he considers weak and even his teammates, and seems to consider himself more important than he really is. However, he values his "friends and buddies".
The second operator of Kazama Squad after Usam.
Kusakabe Squad is team No. 4 in the A-Rank ranking. Their emblem is a dragon-headed rooster, with a design resembling a laurel wreath behind it.
The Operator and Leader of Kusakabe Squad.
A 14-year-old boy and an Attacker of Kusakabe Squad. He is a prodigy, having reached A-Rank at a young age and managing to defeat a Neighbor simulation in four seconds on his first attempt. He is shown to be arrogant and enjoying showing off until Yūma humbles him after attempting to humiliate Osamu, who he was jealous of for being recruited into Tamakoma.
An All-rounder and member of Kusakabe Squad.
The No. 1 Gunner and Member of Kusakabe Squad.
A Sniper and member of Kusakabe Squad.
Arashiyama Squad is team No. 5 in the A-Rank ranking. They are known as "the face of Border" due to their frequent appearances in Border propaganda and promotional materials. Because they spend much of their time promoting Border, many people mistakenly believe that they are inferior to the other A-rank teams. Their emblem is a design of five black pentagons with a white star symbol inside each, arranged to form another star symbol.
The leader of Arashiyama Squad and an All-Rounder. He is fun-loving and charismatic and a loving older brother to his brother and his sister . He befriends Osamu and Yūma after they save the students of their school, including his siblings, and later congratulates Osamu on his promotion and Yūma for joining Border.
An All-Rounder of Arashiyama Squad who considers Osamu to be her rival and seeks to be better than him. She is a child prodigy, having joined Border as an A-Rank member as a middle schooler, and is gentle and humble and willing to help those in need.
An All-Rounder from Arashiyama Squad. He is calm and quiet and does not talk much unless he has something important to say.
The Sniper of Arashiyama Squad, who is cocky but friendly. He is the only sniper able to fire two rifles simultaneously without losing any precision.
The Operator of Arashiyama Squad.
Kako Squad