Assassination Classroom follows the story of a class of misfits tasked with assassinating their alien teacher, Koro-sensei. One of the standout characters in the series is Karma Akabane, a highly skilled and intelligent assassin with striking blue hair. Karma's ruthless nature and natural talent make him a formidable opponent, and his blue hair only adds to his mysterious and deadly aura. His character development throughout the series is also noteworthy, as he learns to use his skills for the greater good.Assassination Classroom
Black Cat tells the story of Train Heartnet, a former assassin turned sweeper, who is known for his deadly accuracy and agility. Train's blue hair is a trademark of his character, and it perfectly complements his calm and collected demeanor. As a former member of the infamous assassin organization known as Chronos, Train's past catches up to him as he is forced to confront his former allies and his own inner demons.Black Cat
In the world of Code Geass, Lelouch Lamperouge is a master strategist and leader of the rebellion against the Holy Britannian Empire. With his signature blue hair and geass power that allows him to control others, Lelouch is a force to be reckoned with. His determination and intelligence make him a formidable assassin and leader, as he fights for his ultimate goal of creating a better world for his sister.Code Geass
In a world where superpowered humans known as Contractors exist, Hei stands out as one of the most skilled and feared assassins. With his electric blue hair and ability to manipulate electricity, Hei is a deadly force to be reckoned with. His cold and emotionless demeanor only adds to his mysterious allure, making him a standout character in the series.Darker than Black
Light Yagami, the main protagonist of Death Note, may not be a traditional assassin, but his use of the Death Note to eliminate criminals certainly makes him a formidable one. With his striking blue eyes and hair, Light is a genius high school student who believes he is doing justice by ridding the world of evil. However, his pursuit of a crime-free world leads him down a dark and twisted path.Death Note
In the world of Fate/stay night, magicians known as Masters summon heroic spirits to fight in a battle for the Holy Grail. One of the most skilled and deadly Masters is the blue-haired assassin, Kojiro Sasaki. His calm and collected demeanor, coupled with his impressive swordsmanship, make him a deadly opponent in battle. His character is also based on the historical figure, Miyamoto Musashi, adding a unique twist to his character.Fate/stay night
In the world of Fullmetal Alchemist, the Elric brothers seek to restore their bodies after attempting to bring their mother back to life through alchemy. Along their journey, they encounter the skilled and deadly assassin, Scar. With his blue tribal markings and ability to use alchemy, Scar is a formidable opponent who seeks revenge against those who wronged his people. His character arc and struggle with morality make him a complex and intriguing character.Fullmetal Alchemist
In a dystopian future, Psycho-Pass follows a society where individuals' mental states are constantly monitored and judged by the Sibyl System. Akane Tsunemori, a member of the Public Safety Bureau, must navigate a world where criminals are identified before they even commit a crime. Along the way, she encounters the enigmatic and skilled assassin, Shogo Makishima, with his distinctive blue hair. Makishima's intelligence and manipulation make him a formidable foe for Akane and the Bureau.Psycho-Pass
Sword Art Online is a popular anime series that follows the adventures of Kirito, a skilled swordsman and gamer who becomes trapped in a virtual reality game. With his signature dual swords and unique blue hair, Kirito is a fan-favorite character known for his determination and bravery. Throughout the series, he faces numerous challenges, including fighting against other skilled players and bosses, making him a true assassin in the world of SAO.Sword Art Online
Tokyo Ghoul is a dark and intense series that follows the story of Ken Kaneki, a college student who becomes half-ghoul after a deadly encounter. As he struggles to come to terms with his new identity, he becomes involved in a world filled with ghouls and the organization known as the CCG, who hunt them down. One of the most skilled and deadly ghouls is Juuzou Suzuya, with his blue hair and twisted personality. His unique weapons and fighting style make him a standout character in the series.Tokyo Ghoul