Osamu Mikumo

Original Name 三雲 修
Romaji Name Mikumo Osamu
Nicknames Four Eyes, Megane-kun
Series World Trigger
Age 15
Weight N/A
Height 168 cm
Date of Birth May 23
Blood Type A


Osamu Mikumo, a main protagonist in the anime series World Trigger, is portrayed as a very honest and determined individual. He has a strong sense of justice and is known for his unwavering courage. Osamu’s honesty is recognized by Yuuma Kuga, a character with the ability to detect lies, which earns him a great deal of trust from others. He consistently goes out of his way to help others, even if it means putting himself in danger. Osamu’s main motivation for joining Border, the organization within the series, is to help and protect his friends, especially Chika Amatori.

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Osamu Mikumo is a member of Border, an organization dedicated to defending Earth from invading creatures known as Neighbors. He joined Border after being rescued by Jin Yuuichi, another member of the organization. Osamu initially has a low level of Trion, which refers to the energy used by Border agents to activate their weapons, shields, and other tools. Despite this, he is determined to become a valuable asset to his team and works hard to improve his skills.


Osamu Mikumo is depicted as a young teenager with glasses. He has short, dark hair and is 168 cm tall. Osamu usually wears the Border uniform, a white outfit with black accents and a red tie.


As a member of Border, Osamu initially served as an Attacker, a combat role focused on close combat. However, due to his low Trion level, he later becomes a Shooter, a role that requires precise marksmanship and strategic positioning. Despite his limitations, Osamu displays exceptional combat intelligence and resourcefulness, allowing him to overcome challenges through clever tactics rather than brute force. He relies on his ingenuity and strong sense of teamwork to support his squad members.


Osamu Mikumo comes from the anime and manga series World Trigger, created by Daisuke Ashihara. The series is set in a world where humanity is under constant threat from Neighbors and follows the story of Border, an organization formed to protect Earth. Osamu’s character development and growth throughout the series highlights his determination, courage, and unwavering sense of justice.


The information provided is based on the character description found on MyAnimeList.net and other available sources.

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Osamu Mikumo – FAQ

Who is Osamu Mikumo in “World Trigger”?

Osamu Mikumo is one of the main characters in the manga and anime series “World Trigger”. He is a member of the Tamakoma Branch and a C-rank Border Agent.

What is Osamu Mikumo’s role in Border?

Osamu Mikumo is the operator and strategist for his unit in Border. He is responsible for making tactical decisions and supporting his teammates during combat.

What are Osamu Mikumo’s strengths?

Osamu Mikumo is known for his excellent tactical planning and strategic thinking. He is highly analytical and often comes up with creative solutions to overcome difficult situations. Although he does not possess remarkable combat skills, he makes up for it with his intelligence and resourcefulness.

What is Osamu Mikumo’s trigger?

Osamu Mikumo primarily uses the “Kogetsu” Trigger, a melee weapon in the form of a sword. He is proficient in its use and has developed his own unique fighting style to maximize its effectiveness in combat.

What are some of Osamu Mikumo’s notable accomplishments?

Osamu Mikumo has several notable achievements throughout the series. He played a crucial role in the defense of the Tamakoma branch during the Great Invasion arc, where he demonstrated his strategic abilities and leadership skills. He also participated in the B-Rank Wars, contributing to the success and growth of his team.

Does Osamu Mikumo have a weakness?

Osamu Mikumo’s main weakness is his lack of exceptional physical prowess compared to other high-ranking agents. He struggles in direct combat situations and often relies on his teammates for protection. However, he compensates by using his intelligence and careful planning to outmaneuver his opponents.