Top 10 Anime With A Dark/Overpowered/Badass Main Character!
1. Code Breaker
Riding the bus one day, Sakurakouji Sakura looks out the window to see people being burned alive with a blue fire and a boy her age who's unharmed and standing over the people. She comes back to the site the next day and there are no corpses or evidence of any kind of murder, just a small fire. She then goes to class to find there's a new transfer student, Oogami Rei, who looks exactly like the boy she saw before and wears a black glove only on his left hand. Oogami is a Code Breaker, one who "does not exist". He is a seemingly cold-blooded killer who follows the principle of "an eye for an eye", to "use evil against evil". Convinced that killing is not right, Sakurakouji sets out to stop him and penetrate his icy heart.
2. Devil Survivor 2
Mysterious invaders called the Septentriones arrive in Japan and begin attacking the country on a Sunday. To fight back, the heroes in Devil Survivor 2 signed a pact with the devil to become the Thirteen Devil Messengers. The Septentriones show up at least once a day and you have a time limit of seven days to defeat them.
During the construction of the Kurobe Dam, an ancient artifact was discovered, and so the United Nations Kurobe Research Institute was established. Intellectuals from all over the world gathered to study the object, and the children of those researchers attend Mt. Tate International Senior High School, including the institute head's daughter, Yukina Shirahane. In the summer of 2016, a lone samurai once again awakens.
4. Fate / Apocrypha
The Holy Grail is a powerful, ancient relic capable of granting any wish the beholder desires. In order to obtain this power, various magi known as "masters" summon legendary Heroic Spirits called "servants" to fight for them in a destructive battle royale—the Holy Grail War. Only the last master-servant pair standing may claim the Grail for themselves. Yet, the third war ended inconclusively, as the Grail mysteriously disappeared following the conflict. Many years later, the magi clan Yggdmillennia announces its possession of the Holy Grail, and intends to leave the Mage's Association. In response, the Association sends 50 elite magi to retrieve the Grail; however, all but one are killed by an unknown servant. The lone survivor is used as a messenger to convey Yggdmillennia's declaration of war on the Association. As there are only two parties involved in the conflict, the Holy Grail War takes on an unusual form. Yggdmillennia and the Mage's Association will each deploy seven master-servant pairs, and the side that loses all its combatants first will forfeit the artifact. As the 14 masters summon their servants and assemble on the battlefield, the magical world shivers in anticipation with the rise of the Great Holy Grail War.
Five years ago, almost every villager of Ootsuka died due to a tragic plague. But mysteriously enough, three survivors: a girl and two boys, emerged. Now living in a church, the three live in isolation, hidden from those who may seek to find them. Shino, one of the survivors, has control over the power of Murasame, the blade of life. But when the imperial church seeks to take the Murasame for themselves, their peaceful life becomes a thing of the past…
6. Nurarihyon no Mago
Rikuo Nura, is 3 parts human and a quarter Demon, lives in a house of spirits with his grandfather, The current clan head of the Nura youkai. Rikou is set to be the next clan head, despit the fact he dilikes his demon side. He soon come to terms with his demon blood and decides to take his position as young master of the Nura house. However there are those who will certainly not allow it to be easy.
Inuyashiki Ichirou is down on his luck. While only 58 years old, his geriatric looks often have him written off as a pathetic old man by the world around him and he's constantly ignored and disrespected by his family despite all that he's done to support them. On top of everything else, his doctor has revealed that he has cancer and it appears that he has little time left in this world. But just when it seems things couldn't get any worse, a blinding light in the night sky strikes the earth where Ichirou stands. He later wakes up to find himself unscathed, but he soon starts to notice that there's something... different about himself. However, it turns out that these strange, new changes are just what Ichirou needs to take a new lease on life and now it seems like there's nothing to stop him from being a hero worthy of the respect that he never had before... unless, that is, there was someone else out there with these same changes...
Koko Hekmatyar, a young arms dealer sells weapons under HCLI, a shipping corporation. As one of the company's unofficial weapon sellers, she secretly sells weapons in many countries while avoiding the local authorities and law enforcements as most of her work is actually illegal under international law. Travelling with her is her team of bodyguards who are mostly composed of ex-military veterans. Her latest addition to the crew is Jonah, a seemingly emotionless child soldier who is skilled in combat yet ironically hates arms dealers. Jonah joins Koko as he wishes to find the arms dealer responsible for his family's death. What follows is Koko and her crews escapades around the world.
March 25th—just another day during spring break. Koyomi Araragi, a second year high school student at Naoetsu High School, befriends Tsubasa Hanekawa, the top honors student at his school. Tsubasa mentions a rumor about a "blonde vampire" that has been sighted around their town recently. Koyomi, who is usually anti-social, takes a liking to Tsubasa's down-to-earth personality. That evening, Koyomi encounters this rumored vampire: she is Kiss-shot Acerola-orion Heart-under-blade, also known as the "King of Apparitions." The blonde, golden-eyed vampire cries out for Koyomi to save her as she lies in a pool of her own blood, all four of her limbs cut off. Kiss-shot asks Koyomi to give her his blood in order to save her life, and when he does, the very next moment he awakes, Koyomi finds himself re-born as her vampire kin. As Koyomi struggles to accept his existence, Kiss-shot whispers, "Welcome to the world of darkness..."
10. Psycho - pass
In the future, it is possible to quantitatively measure a person's emotions, desires, and every inclination. In this way, it is also possible to measure a person's criminal tendency factor, which is used to judge criminals. This is the story of a team of policemen dedicated to maintaining public order. Some of them work in the Enforcement Division, responsible for the apprehension of criminals, while others belong to the Supervisory Division which oversees their colleagues in Enforcement.