Tatsuhiko Shibusawa/Synopsis

Dragon's Head Conflict
Six years ago, the Special Division for Unusual Powers summoned Shibusawa to stop the Dragon's Head Conflict that had eventually raged for 88 days, but instead, Shibusawa used the opportunity to further his own goals. Somehow, he developed his own organization. On the 61st day of the conflict, he targeted a jewelry store to steal its gemstones and killed every ability user guarding them, including an accomplished mercenary who fought in the war and the leader of a group within Gelhart Security Service (GSS).

Right before Shibusawa took his leave, Sakunosuke Oda arrived at the scene after receiving the news, claiming Shibusawa must be a newcomer to Yokohama because the latter didn't know that the jewelry store was a depository for the GSS, a powerful criminal organization who abstained from participating in the feud. Shibusawa then hinted that the culprit was the White Kirin, whom Oda knew from reports as an ability user who came a few days ago and had been attacking all organizations involved in the conflict. After Shibusawa departed, Osamu Dazai contacted Oda that the man he just talked with was the White Kirin (白麒麟,), the man planning on taking over the feud.

Over the course of 70 days in the conflict, Shibusawa had managed to dismantle various organizations, including Strain, one of the four biggest international crime syndicates; Takasekai, whose leader's assassination left their chain of command in chaos; Shadow Blades, an illegal arms dealer; Bishop's Staff, a former religious group; and KK Company, a smuggling group. Furthermore, he killed one of the Port Mafia's executives aliased the Colonel, leaving an opening in the Mafia executive position.

On the 72nd day of the feud, Shibusawa was ambushed by Dazai and various mafiosi in an elaborate setup. Dazai urged him to surrender, telling Shibusawa that he is a nullifying ability user. Shibusawa advised him that he himself was the only chance of ending the feud, which he planned to accomplish with another feud. An explosion suddenly took place in the Mafia headquarters and collapsed it; Shibusawa revealed that he was not working alone and declared all-out war on all criminal organizations. Sometime after, Shibusawa occasionally met Fyodor Dostoevsky, who advised him to move on with his next targets if his erstwhile plots bored him.

Towards the end of the conflict, Shibusawa's group captured six of the Mafia's men, along with Dazai who purposely allowed to get caught. The latter eventually got retrieved by Chūya Nakahara, and they soon reached Shibusawa's Draconia room, finding him burning gems and alternating between "It will be mine" and "It will not be mine". Bored out of his mind, Shibusawa languidly informed Chūya that his comrades killed themselves. Enraged, Chūya activated Corruption, with Shibusawa presumably getting caught in the ensuing destruction.

Nonetheless, the government protected Shibusawa and even covered up his crimes overseas, as they deemed his ability a valuable asset in counteracting a possible gifted nationwide invasion even until years later.

DEAD APPLE
Three years later after the Dragon's Head Conflict, Shibusawa releases his fog known as the "breath of the dragon" (龍の吐息,) in, killing a fire ability user Zhang Jianlin. Two years later, he goes to, where his fog kills Hafis bin Wan, a card-wielding gifted. Half a year later, in, Shibusawa once more performs the same incident that kills the ice-manipulating ability user Emily Jane Smith in the fog. All three abilities have since then been collected by Shibusawa.

A year after the large-scale incident with the Guild, there have been 128 confirmed cases related to the mysterious fog and at least 500 ability user deaths, with the Special Division for Unusual Powers referring to the chain of events as the Serial Skill User Suicide Phenomenon. Eventually, the case is handed to the Armed Detective Agency after discovering that Shibusawa, aliased the Collector, has made his way to Yokohama. Dazai is suspected of bringing Shibusawa to the city and later cornered for arrest by Ango Sakaguchi for his involvement with Shibusawa. Dazai, however, apparently evades arrest when Shibusawa arrives and generates his fog on the Special Division agents.

Shibusawa soon welcomes Dazai and Fyodor in Skull Fortress. After Shibusawa declares that he shall acquire all abilities in Yokohama, they voice out their mutual distrust with one another despite being "collaborators", each obscuring their specific aim in the fog phenomenon. Later, he brings them to Draconia, his collection room of crystallized abilities that he has acquired over time, half of which he owes to Fyodor for selling him information about the ability users. When another crystal appears in his collection, signifying that an ability user has just died, Shibusawa laments still not having the valuable ability he seeks.

As Dazai and Fyodor secretly work behind Shibusawa and carry out their plan to starve the fog of its energy with Dazai's nullification ability, they end up forming an ability sphere that has been unified from all the crystallized abilities in the room. Before Dazai can nullify the massive sphere to end the fog phenomenon, Shibusawa stabs Dazai with a poisoned knife, indicating knowledge of their plan and with Fyodor having double-crossed Dazai. Shibusawa then attempts to collect Dazai's ability crystal, only for it to create a singularity with the unification ability sphere, which he has not expected.

Fyodor correctly conjectures that Shibusawa has initially thought acquiring Dazai's nullification ability shall return his lost memories to him, but he assures that Shibusawa shall never remember. To help him recall, Fyodor slashes Shibusawa's throat, causing him to finally remember his past encounter six years ago, including his death at the hands of Atsushi Nakajima, whom he tortured in hopes of forcibly acquiring his ability that Fyodor told him was coveted by all other gifted individuals.

After his death, Shibusawa's ability separated from his corpse and, forgetting his death, managed to grow his collection. The singularity in Draconia then incarnates into a colossal dragon, which Chūya eventually manages to defeat. However, Fyodor places a fragment of the crystal that gathers abilities into his skull, turning Shibusawa into the new singularity and reviving him into a draconic ability-like life-form. He then generates an enormous red fog of higher intensity that is projected to engulf the entire world.

Shibusawa is soon confronted by Ryūnosuke Akutagawa and Kyōka Izumi, whom he overwhelms even after they have retrieved their own abilities in the fog. Soon after, Atsushi manages to reconcile with the tiger and enters the battlefield. Shibusawa's strength proves to be stronger than their individual skills, so the three opt to work jointly and trap Shibusawa, where he is repeatedly attacked by Atsushi. Shibusawa soon breaks free from the momentum and tears through the cage; he extracts Atsushi's ability and reaches out for the steal, but Atsushi grabs it and gets into a final standoff against Shibusawa.

With his powers apparently diminishing, Shibusawa muses that he finally understands why they have met and that Atsushi is the angel meant to save him. His crystal horn and body disintegrate, leaving only behind his skull. Atsushi breaks it once and for all, which cements Shibusawa's death and the dissipation of the fog he created.