Osamu Dazai

Dazai is a young man 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 terms of 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.

Back when he was in the Mafia, Dazai wore a black 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.[10]

After the cannibalism, Dazai wears a formal suit during the Agency's celebration.[11]

During the Yokohama fog incident, Dazai wears a white waistcoat over black long sleeves and a brown tie, together with white pants. A lapel pin can be also seen attached to his padded overcoat.[12]

After being arrested by the Hunting Dogs and taken to Meursault, Dazai is currently wearing white prison clothes.[13

Dazai is a mysterious person, his true intentions are never revealed unless he reveals them. The person who got closest to the truth of his personality, as acknowledged by Dazai himself, was his friend Sakunosuke Oda, who recognized that Dazai shall linger in the darkness forever, as there was nearly nothing that can surpass his mind. Regardless whether he is on the side of killing people or saving them, Oda knew that no place in the world could fill Dazai's loneliness, which Oda thought Dazai knew in himself.[10] 35

Behind this grim persona, Dazai admitted that he joined the Mafia to be exposed to death, violence, and people giving in to their urges and desires, expecting that—in this way—he would be able to see the inner nature of humankind firsthand in hopes of finding a reason to live.[10] Following Oda's demise, Dazai defected from the Mafia and went underground in order to heed Oda's final request for him to "be on the side that saves people". Admittedly, he reckoned that people change over time[1] where potential surfaces,[14] which apparently seems to apply to himself as well.

Upon joining the Agency, Dazai is usually called lazy, with Doppo Kunikida always scolding him for being unproductive and slacking off. Despite that, he has shown a sharp wit, deducing all the unlikely situations that led Atsushi Nakajima to believe he was being stalked by a tiger when he was the tiger in question.[16] He has complete confidence no matter what type of situation he is dealing with, be it combat or simply bad situations he formulated in the first place.[17][3] In most occasions, Dazai is overly dramatic. He takes most of his actions as a joke, and, although they are very well-thought plans, he does not credit himself for most of what he has done. Dazai likes to tease anyone and everyone, especially if it means that he can get a laugh out of it.[3] As a suicide maniac, he often attempts to commit suicide in comical manners, but he oftentimes fails[6] or gives up on it when such methods are painful.[18] Dazai, in particular, wishes to commit double suicide with a beautiful woman;[19][20][3] though he admits that he "likes all types of women", he possibly prefers the type who would die with him if he asked to.[10] Kunikida once wondered why Dazai is quite popular with women and called him a menace to women,[21] a sentiment Chūya Nakahara once used when he threatened to leak Dazai's address to every woman he ever made cry, which Dazai soon asked him not to do.[2] Dazai also once had a run-in with a bomb threat instigated by a woman whom Dazai figured was obsessed with him.[21]

While his suicidal tendencies are initially comedic, they reveal a truly dark deep hole that Dazai has. Even as a teenage boy, Dazai questioned whether there was any value in life.[9] Thus, he soon tried to fill this hole and find a reason worth living for, choosing to live a life surrounded by 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 well. In the past, while he was still suicidal, it was shown to be far less comedic. He even described the death as a way to free himself from the oxidizing world, but, strangely enough, he could not die no matter how hard he tried. Additionally, he was extremely brutal and methodical, setting up traps to catch captives alive to torture them for information, and he would often beat his then apprentice Ryūnosuke Akutagawa for disobeying orders and to push him to the limits to improve his abilities.[10]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 he doesn't inform his teammates what they are until the time is right.[22] When he is able to see through the enemies' schemes, no matter how complex, Dazai would sometimes plot to run along with a charade if he deems it necessary, which he did during his entrance exam in order to let Kunikida's suspicions arouse over him as planted; in so doing, they were able to break free from their opponent's ruse and eventually catch the mastermind behind.[6]

Dazai is also willing to use dirty means to achieve his goals, such as purposely deflating Ango Sakaguchi's car seat airbag when they crashed so Ango would get injured and force him to cooperate with Dazai for pardoning Kyōka in exchange for having his wounds healed.[23] Nonetheless, he does care for his teammates and watches out for them, especially Atsushi for whom he sees the greatest potential. Moreover, Dazai develops a sense of duty and utilizes his wit and intelligence to the Agency in their quest to help maintain Yokohama's peace and order. As part of his various plans and well-calculated strategies, he even devised for Atsushi and Akutagawa to collaborate at times to become a new generation of Twin Dark who could take on the brewing evil lurking within the city.[24]

He's very cruel and very violent, he won't spare your feelings or physical pain.

His kinks & things that he would do/force into you:

1. using toys on u
2. rough sex
3. hitting you, cutting you, punching you, etc.
4. bladder desperation
5. spitting on you
6. LOVES to see you crying. out of pain, pleasure, anything.
7. making you feel gross and so gross things
8. cumming on you, obviously
9. scaring you with the thought of pregnancy
10. forcing you to worship his cock
11. gagging you with his fingers
12. looking under your skirt or flipping it up
13. making you strip in front of him
14. forcing you to fuck him, obviously
15. edging you
16. overstimulating you for hours straight
17. humiliating you in anyway he can
18. forcing you to be his dog
19. whipping you
20. hard nipple clamps
21. drugging you
22. making you cum in your panties
23. pulling your pants down, cumming into them, then pulling them back up
24. having you address him as owner or daddy
25. Diapers: No Changes Some babies like full diapers, but even for them, their full diaper will get uncomfortable after a while. So as a punishment, you can simply do less work and delay a diaper change for as long as you desire. However, make sure to change your little before their full diaper explodes! To make sure the diaper can last long enough, you can stack multiple diapers of increasing sizes. Just slice the inner diapers’ outer layer before you put them on. You can also add a baby diaper as a stuffer to lower the chance of leaks and increase absorbency. In addition you can put a thick cloth diaper package on top and the diaper will last a very long time! Don’t forget to use lots of diaper rash cream or there might be a nasty rash which would be a punishment in itself but is harmful to your little’s health, so dump some cream into their diaper first! Irritants There are some things which are quite yucky, but aren’t really harmful. Now I’d still recommend you to test those on a small spot first to see if there’s any allergic reactions like lots of reddened skin. If there isn’t, a pretty itchy punishment is to add some Itching Powder into your little’s diaper. This will make them squirm as they can’t exactly scratch themselves through their diaper. There are some itching powders which are skin-safe and others that aren’t, so make sure to do some research. Typically the most common itching powder is made from plants like the seeds of the common rose. Chili Pepper A chili pepper is a nice fruit with some spicy surprise… at least the first time you eat it. But it’s pretty nasty stuff when it gets on your skin or you eat it in high concentrations. You can simply take some pepper powder or a fresh one and put it into your baby’s diaper! Now again, make sure to test it on a small spot before to see the reaction first and then decide on the amount. It’ll be really intense, so keep that in mind. 24/7 Your little doesn’t wear diapers full-time or at all? Well, why not change that? As a punishment, you can keep your little diapered for however long you see fit. They need to keep them on even when going outside and they need to use them like a proper baby! Extra Thick Diaper Wearing thick diapers will definitely force your baby’s legs apart and make walking more difficult, reminding them with every step what’s between their legs. It might even get uncomfortable after some time. Spreading Diaper or Harness This won’t need a lot of extra diapers and you can increase the leg spread to extreme levels, causing discomfort after a while of wearing. It will also keep your baby from walking around which babies shouldn’t do! Can’t Ask For A Change Feeling your full diaper but being totally helpless is a pretty babyish experience. Tell your little that they can’t ask for a change or give you any hints that their diaper needs one! This means you will have to check them and only if you do, they might get a change! Excessive Diaper Checks It’s better to be safe than sorry, right? So up your diaper checking frequency and maybe have your little stand up and touch their toes for you to make it easier. It will surely remind your baby that you are in charge if they get checked every 15 minutes!

Ability

Main article: No Longer Human

No Longer Human (人にん間げん失しっ格かく,, Ningen Shikkaku?) allows Dazai to nullify others' abilities on contact. It relies on skin contact and is always active. As such, he can nullify any ability even while restrained as soon as it touches him.