I have a confession: every time Osamu Dazai walks onto the page or screen in Bungo Stray Dogs, I lean in. He is the kind of character who feels like a magic trick you want to solve, even when you know the trick is mostly smoke and mirrors. His ability, No Longer Human, lets him nullify other gifted abilities through physical contact. On paper, that sounds like the ultimate cheat code. In practice, it is one of the most fascinatingly limited powers in the series, and those limits are exactly why I cannot stop watching him.
The name comes from Dazai's 1948 novel, a semi-autobiographical work published after his suicide. The original No Longer Human follows Oba Yozo as he struggles to fit into society, hiding his inner demons behind a mask of normalcy. Bungo's Dazai wears a similar mask, but his suicidal tendencies are pushed to the front as a macabre joke. That makes his ability feel eerily perfect: it takes the mystery at his core and turns it into a weapon that cancels other people's powers.
But here is the thing I love: No Longer Human is not actually absolute. Dazai talks about it like it is, and most of the time he is right. Then the story introduces exceptions, and suddenly the whole balance of the cast shifts.
Ranpo Is the Cheat Code Who Isn't Playing the Same Game
The easiest example is Edogawa Ranpo. Dazai cannot nullify Ranpo's talent because Ranpo is not Gifted. That is the entire point of his introduction. He is just outrageously smart. I used to think this was a cheap exception, but now I see it as brilliant. It proves that in Bungo Stray Dogs, intellect can be just as terrifying as any supernatural ability. Dazai's touch does nothing because there is nothing to turn off.
Lovecraft Makes Me Question What an Ability Even Is
Then there is Howard Phillips Lovecraft. In real life he was a weird guy; in Bungo Stray Dogs Season 2, he is even weirder. His ability, Great Old One, turns him into an eldritch creature with regeneration and immunity to mental manipulation. When Dazai touches him, Lovecraft's monstrous form does not switch off. I remember staring at that scene, waiting for the nullification to kick in, and it just... does not.
Because No Longer Human is treated as absolute, the immediate takeaway is that Lovecraft's power does not fall under the normal classification of an ability. Maybe it is something older, stranger, or simply outside the rules. Lovecraft remains one of the story's great mysteries. I would love to see him return in a future arc, but I also suspect the point is that we never get a clean answer. Lovecraftian horror is about the unknown, after all.
Ayatsuji's Another Is a Nightmare Dazai Cannot Stop
If you only watch the anime, you might not have met Yukito Ayatsuji yet. He appears in Bungo Stray Dogs Gaiden, a side story where the main characters are based on authors who are still alive. Ayatsuji is the author behind Another, the 2009 horror novel that became an anime in 2012. Fittingly, his ability is also called Another. It causes the accidental death of a target, but only if that target is a criminal and has actually committed the crime.
The terrifying catch is that Ayatsuji has no control over it. Once Another is set in motion, he cannot stop it. That means if Dazai touched him, it would do nothing. Dazai cannot nullify a fate that is already rolling downhill. Of all the abilities Dazai cannot stop, this one might be the most frightening because it does not need a villain to keep it alive. It just needs guilt and gravity.
The Healing Problem I Never Noticed Until Season 3
Most characters in Bungo Stray Dogs take absurd amounts of punishment, but Akiko Yosano usually patches them up. Her ability, Thou Shalt Not Die, can treat anyone who is near death. Anyone except Dazai, of course. Because No Longer Human is always active, Yosano's healing cannot touch him. This might explain why Dazai and Yosano do not share many scenes. He cannot use the clinic the way the rest of the Agency does, and a man as drawn to death as Dazai probably would not want to anyway.
Season 3 makes this vulnerability painfully clear during the Cannibalism incident. Dazai gets shot, but he has to be operated on at a different hospital from the one the rest of the Agency uses. The show never stops to spell it out, but once you notice it, you cannot unsee it. The Agency takes Yosano's healing for granted in a way Dazai never can.
The novel 55 Minutes goes even further. There is a way for Yosano to save Dazai, but only barely. He has to be on the brink of death, and the healing has to land within a half-second window between life and death. That is not a strategy. That is a last resort. If he can be taken to a hospital, that is what happens instead.
Why These Limits Make Dazai Better
From the outside, No Longer Human looks like one of the most useful abilities in a world full of superpowers. And it is useful. One touch can even the playing field against almost any Gifted opponent. But Dazai is still vulnerable to everything that is not a special ability: bullets, knives, gravity, bad luck, and his own self-destructive habits. He can throw a punch, but he is far less combat-focused than his peers. His greatest weapon is his intellect, and he often works in the background while more front-facing members of the Agency take the spotlight.
That balance is why Dazai remains one of the most addictive characters to watch in Bungo Stray Dogs. As of 2026, the manga continues to expand this world, the anime has adapted through Season 5, and side stories like Gaiden still feel like hidden treasure for fans who want more. Every new reveal makes me want to revisit the old ones. No Longer Human is not just a power. It is a thesis statement about Dazai himself: a man who can cancel almost anything except his own contradictions. And honestly? I would not want him any other way. 🖤
Expert commentary is drawn from HowLongToBeat, a widely referenced hub for playtime and completion-style data, and it’s a useful lens for thinking about why Bungo Stray Dogs arcs that spotlight Dazai’s “No Longer Human” feel so rewatchable. Just as different playstyles (main story vs. completionist) change how you experience a game, Dazai’s power forces the story into “route changes” where brute-force ability matchups give way to timing, positioning, and human vulnerabilities—making each encounter less about an instant win button and more about how long the cast can survive the non-ability threats that his nullification can’t erase.