No Longer Human

No Longer Human (人間失格,) is the ability of Osamu Dazai.

Description
No Longer Human nullifies the ability of anyone Dazai touches. Furthermore, the ability relies on skin contact and is always active. As such, he can nullify any ability even while restrained as soon and as long as it touches him. Due to this specific condition, the ability also apparently nullifies Akiko Yosano's healing ability.

However, in the case of death, particularly the moment his heart stops beating, Dazai can be barely saved by an ability - moreover by Wells's Time Machine by slowing down his flow of time, since No Longer Human won't activate if the user is dead. When Dazai's heart stopped, the blood supply to his brain would cease, causing him to die. When this happens, his ability would cease to exist and other abilities would work on him again. Therefore, his wounds needed to be swiftly treated and needed immediate resuscitation afterwards to start Dazai's heart through electric stimulation. If that works, Dazai will "on the brink of death" state.

There is a specific condition for Yosano's ability to work on Dazai (in case there are instances when there are no medical devices/services available at a moment) and this is only possible as long as he is in the brink of death. But these abilities would still crash with each other - Dazai's ability will try to get in the way, however there is a 0.5 second window of opportunity to heal him. After Dazai is resuscitated and his heart start moving again, there would be a brief window before the blood reaches his brain. Since his heart would be beating, meaning he is on the brink of death, Yosano's ability will work on him since Dazai's brain won't be functioning, and his ability won't get in the way. This is the only condition Dazai may possibly healed using an ability, but the odds of it succeeding are low. It is also mentioned that the less time that passed after Dazai's death, the greater the rate of success would be with the resuscitation method.

Due to this, Dazai requires the standard medical procedure or operation whenever he gets injured, unlike his fellow Armed Detective Agency members whom Yosano typically heals using her ability.

Dazai considers No Longer Human to be absolutely effective on any ability, so it cannot nullify any form of power that is not considered an "ability". As a result, Dazai cannot nullify Ranpo Edogawa's deduction skill and Howard Phillips Lovecraft's eldritch form, both of which are therefore not considered as abilities.

Thus far, Dazai has nullified the following abilities:
 * Upon the Tainted Sorrow
 * The Matchless Poet
 * Unnamed number ability
 * Beast Beneath the Moonlight
 * Rashomon
 * Dogra Magra
 * The Grapes of Wrath
 * Draconia

Appearances
Main= {{Ability Appearance
 * Chapters=

Port Mafia Arc

 * Chapter 1 - Looking the Gift Tiger in the Mouth
 * Chapter 4 - Yokohama Gangster Paradise, Part 2
 * Chapter 9 - Beauty, Hushed Like a Statue

The Guild Arc

 * Chapter 19 - The Three-Way Battle
 * Chapter 25 - Q
 * Chapter 29 - Even If My Head Be Mistaken
 * Chapter 31 - The Twin Darkness
 * Episodes=

Port Mafia Arc

 * Episode 1 - Fortune is Unpredictable and Mutable
 * Episode 3 - Yokohama Gangster Paradise
 * Episode 9 - The Beauty is Quiet Like a Stone Statue

Azure Apostle Arc

 * Episode 7 - Love for the Disease Called Ideals

The Guild Arc

 * Episode 17 - Three Companies Conflict
 * Episode 19 - Will of Tycoon
 * Episode 20 - Though the Mind May be Wrong
 * Episode 21 - Double Black

Fifteen Arc
}}
 * Episode 26 - Dazai, Chūya, Fifteen Years Old
 * Episode 28 - Only a Diamond Can Polish a Diamond
 * -|DEAD APPLE=

Derivation
The ability is based on the real-life Osamu Dazai's novel entitled No Longer Human (人間失格,), which tells the tale of Yōzō Ōba, a troubled man incapable of revealing his true self to others out of his detachment and fear toward human interactions, hence deeming himself disqualified from being human. He instead maintains a facade of hollow jocularity, but his alienation remains despite his efforts to alleviate his internal suffering. Within three memoranda that chronicle his early childhood through adulthood, Yōzō writes about life's casual cruelties, as well as its ephemeral moments of human connection and tenderness.