Osamu Dazai

Osamu Dazai is one of the main characters from the Bungou Stray Dogs anime and manga.

Osamu is a member of the Armed Detective Company and was a former Executive of the city's worst underworld organization, the Port Mafia.

Appearance
Dazai is a handsome male with mildly wavy, short dark brown hair and narrow dark brown eyes. His bangs frame his face, while some are gathered at the center of his forehead. He is quite tall and slim in physique.

For his attire, Dazai wears a long sand-colored trench coat, the belt of which he leaves untied. Under it is a black vest over a striped dress shirt that is light blue in hue. He wears a bolo tie, which is held by a brown ribbon and a turquoise pendant. He also dons beige pants, dark brown shoes, and has bandages wrapped around his entire body; only his face, hands, and feet are left uncovered. The reasons for the bandages are yet to be discovered.

Back when he was in the mafia, Dazai wore a dark trench coat that reached under his knees. He also wore bandages over his right eye and his right arm is in a sling—presumably products of his suicidal pastimes. At some point, he was able to regain the use of his right arm; the same arm he then used to aim and fire a gun at Akutagawathree times.

Personality
Dazai is a mysterious person, his true intentions are never revealed unless he himself reveals them. The person who got closest to the truth of his personality, as acknowledged by Dazai himself, was his friend Sakunosuke Oda, who said to him, "it can't be found. (...) You should know this yourself. No matter whether you're on the side of killing people or saving people, there will never be anything that can surpass your mind. There is no place in this world that can fill your loneliness. You will linger in the darkness forever."

Dazai is usually called lazy as Kunikida always scolds him for being unproductive and slacking off. Despite that, he has shown a sharp wit, deducing all the unlikely situations that led Atsushi to believe he was being stalked by a tiger when he actually was the tiger in question. He has complete confidence no matter what type of situation he is dealing with, be it combat or simply bad situations he himself created in the first place. In most occasions, Dazai is overly dramatic, he takes most of his actions as a joke, and, although they are very thought out plans, he does not credit himself for most of what he has done.

Aside from his quick thinking, Dazai is the comic relief in the series and at times Dazai's soft side can be seen.

He is a suicide maniac, often trying to commit suicide in comical manners but often times failing. He, in particular, wishes to commit a double suicide with a beautiful woman (a nod to his real life counterpart who tried to commit double suicide with various women multiple times). However, while his suicidal tendencies are initially comedic, they reveal a truly dark deep hole that Dazai has and believes he cannot fill. He believed he could fill this hole and find a reason worth living for if he lived a life of bloodshed and war, but his friend Oda with his dying breath convinced him to choose the good side. He understood that even though good and evil mean little to Dazai, he may become a slightly better person if he were to choose good.

In the past, while he was still suicidal, it was shown to be far less comedic. He even described death as a way to free himself from the oxidizing world but strangely enough, he could not die no matter how hard he tried. In addition, he was extremely brutal and methodical, setting up traps to catch captives alive to torture the of information and often beat Akutagawa for disobeying orders and in order to push him to the limits to improve his abilities. He was extremely confident and was a terrific planner, coming up with long run strategies to subdue his enemies. Oda once noted that there was a saying in the Mafia that the worst thing for Dazai's enemies was the fact they were his enemies.

While in the present he is more lighthearted and comical, he still retains some of his darker personality. He is still able and proficient at coming up with long run strategies though doesn't inform his teammates what they are until the time is right. In addition, he is willing to use dirty means to achieve his goals, such as purposely deflating Ango's car seat airbag when they crashed so Ango would have numerous broken injuries. This forced Ango to cooperate with Dazai for pardoning Kyouka in exchange for having his wounds healed. When Kyouka shows remorse over having killed 35 people, Dazai remarks with a sinister face that something like that is nothing. Nonetheless, he does care for his teammates and watches out for them, especially Atsushi for whom he sees the greatest potential.

Abilities
No Longer Human (Ningen Shikkaku, literally "Human Disqualification"): This allows Dazai to nullify others Abilities on contact. His Ability relies on skin contact and is always active. As such, he can nullify any Ability even while restrained as soon as it touches him.

Trivia

 * Dazai's past with Fyodor Dostoyevsky likely refers to the influence Crime and Punishment had on Ōba, the protagonist of No Longer Human.
 * He, along with several other characters, made an appearance in the mobile game Love Heaven as a limited time character.
 * He and several other characters also made an appearance in the mobile game Kimito Lead Puzzle 18 as a limited time character.
 * He and several other characters made another appearance in the mobile game Yumeiro Cast as limited time characters.
 * His constant attempts to commit suicide with a beautiful woman could be an allusion to his real life counterpart's attempted double suicide with Shimeko Tanabe and Hatsuyo Oyama. His attempt with his lover Tomie Yamazaki was ultimately successful.
 * It's also possible that his suicide attempts serve as a reference to No Longer Human 's protagonist Ōba Yōzō's multiple suicide attempts throughout the story, which is considered to be a reflection of Osamu Dazai's turbulent life.
 * He was the youngest Executive in Port Mafia history.
 * In real life, he is often grouped together along with Sakaguchi Ango and Oda Sakunosuke as the Buraiha or Decadent School.
 * And on the series, this is often alluded, because the three used to meet in a certain bar, as seen in Dazai and the Dark Era and illustrated on the calendar.
 * Dazai usually refers to himself by the gender neutral pronoun, "watashi," rather than the more masculine pronouns like "boku" or "ore." This is likely because of the format of traditional I novels, which the real Dazai specialised in, typically used formal "watashi" pronouns over its variants.
 * Dazai is very bad at driving, as shown in the first light novel "Dazai Osamu's Entrance Exam".
 * His type is any woman who would like to commit suicide with him.