Aya Kōda/Synopsis

The Guild Aftermath Arc
While in the train station, Aya receives a suitcase from a unknown man, assuming that it is a lost item, agreed to take it. Kunikida then acidentally saw the suitcase and remembers what Tanizaki about suitcases containing bombs. He then takes the suitcase from her, to which he opens it and it contains bombs. Kunikida throws the suitcase at the air saving her and the others in the train station.

Aya then becomes angry at the man who gave him the suitcase and decides to seek Kunikida's help in finding the culprit. She goes to search with him, even dragging Kunikida on her own. Both of them soon arrive at a train tunnel where the culprit apparently went.

When Kunikida was busy looking at the bombs strapped on the rails, Katsura manages to strap a bomb to Aya, taking Kunikida by surprise. Having to choose between saving Aya or saving a train from being blown up, Kunikida apologizes to Aya. She accepts her fate, saying it is for the sake of everyone else, and the two of them are hit by the bomb.

Yosano manages to heal the two of them, so both Aya and Kunikida are unharmed. After Katsura is captured by the police, Aya implies that she wouldn't mind being Kunikida's girlfriend. Kunikida tells her that she doesn't meet his requirements for a partner, turning her down gently.

Vampire Infection Outbreak Arc
During the terrorism case that framed the Agency as the masterminds, Aya wanders around an airport heading to the lost-and-found corner on behalf of her father. She hears the news of Justice Vice Minister Tonan condemning the Agency as the ones behind the recent disappearances of army staff overseas. Musing on her previous encounter with Kunikida and remembering his ideals, Aya is in disbelief that the Agency are truly terrorists.

Saigiku Jōno suddenly bumps and brushes past her to regroup with Teruko Okura and Tetchō Suehiro; Aya assumes from their uniforms that they might be cops. Aya soon overhears them discuss the Agency and their possible arrival at the airport. She then eavesdrops on them but is later found by Jōno who detects her heartbeat, thinking how they can use someone close to the Agency as a hostage to lure them out.

As Aya is repulsed over his thinking, Jōno admits that he merely wishes to hear the voice of the anguished and listen to their destruction regardless whether they are innocent or indeed guilty, much to Aya's fright. He further pushes her to the edge, until Tetchō stabs Jōno from behind to stop threatening the girl. As Jōno annoyingly challenges Tetchō to a swordfight, Ōchi Fukuchi arrives and stops them; he also returns Aya her phone that got thrown off earlier after bumping into Jōno, assuring that he shall protect Aya's and the people's smiles.

Apparently, Jōno is revealed to have handed Aya earlier a memo asking her to follow him secretly if she believes the Agency's innocence. Hence, Aya witnesses the fight between Fukuchi and Jōno, as well as Fukuchi being the true mastermind of the terrorism plot.

Aya then notices how Fukuchi plans on moving Bram Stoker's coffin, so she resolves to expose Fukuchi to the world. Fueled by her sense of justice, Aya secretly takes a photo of Fukuchi with her phone, but her camera captures with a flash, much to both of their shock. As Aya panics and thinks how to escape, Fukuchi breaks the room's window but finds no one; Aya has actually fled to the next room when he smashed the window.

Desperately thinking of another way to escape Fukuchi, Aya weeps at her situation and thinks that he would kill her even if she apologizes. On the verge of giving up the idea that she is not an ally of justice, Aya thinks of a possible spot where she can hide. When Fukuchi rushes to the room and cuts down the lockers, he finds no one.

Aya is able to get away from Fukuchi's sight by hiding inside Bram's coffin. Meanwhile, Fukuchi halts his search when an explosion in the airport occured causing him to rush outside and leave the scene. Aya continues to hide and waits for a while to get out when the sleeping Bram awakens, with the impending action to bite the one who disturbed his sleep.

As Bram awakens, he inquires Aya her identity. Aya stutters on her words due to fear as Bram reveals his past to her, to which Aya didn't understand. Bram further tries to simplify who he really is to her but immediately dismisses it and just decides to go back to his sleep. Aya gets out from the coffin and sees Bram half body gone. Aya tries to interact with Bram by asking his relationship to Ōchi Fukuchi for which Bram considers the latter as a hindrance to him. As Aya learns Bram's name, she bravely asks him to tell her about what happened so far. Bram responds that it take for a while to fully tell it. Later on, Aya is seen carrying Bram on her back, escaping from the scene.

As the two tries to escape from the scene, they stop at their tracks seeing as all the exits from the airport are blocked after an emergency warning is announced. Aya asks for Bram's help but to no avail. Refusing to help Aya escape from the airport, Aya tries to remove the Holy Sword attached to Bram's body, much to latter's pain shortly after. Bram reveals that the sword is stretched all the way to his brain, hence it would be too painful to be removed. Aya persistently asks for Bram's help in order to save everyone.

She reveals that the only thing she have is determination and he has been keeping his promise to herself - to not run away when a crisis arises - for the past ten years of her life. Aya continues to asks for Bram's help and offers to give him anything he wants in exchange. Seeing Aya's determination, Bram finally gives her a condition: to have a radio. After hearing Bram's request, Aya rummages through her belongings and pulls out her phone. She then lets Bram listen to the phone's radio stations, much to the latter's astonishment.

Still hiding, Aya tries to come up with an idea to escape the shut-off airport, given how Bram is unable to command the vampires without Fukuchi gripping the Holy Sword. Bram soon asks Aya to run as they get spotted by a vampire. She tries to repel the latter off, only to get kicked off by his power. Bram urges her to leave him behind, but Aya refuses. As she runs out of options as a horde of vampires corner them, Kenji Miyazawa rescues them per Ranpo Edogawa's directive. Once he overwhelms them, the trio get approached by Tetchō Suehiro, so Kenji asks Aya and Bram to leave the Hunting Dog to him. Aya then takes Bram and escapes.

Aya brings Bram to a laundry truck which she thinks to be their best shot to escape in. While waiting inside before leaving, Aya suggests to Bram that they remove the Holy Sword stuck on him, but Bram refuses out of the potential doom it would cause. She then asks more about the sword. She learns about the process of merging abilities into human bodies as vessels, as well as how Bram had been struck before in the past by the sword, and the second time was by Fukuchi, who now wields control over his ability through it. During their wait, their truck gets sliced by the undead Ryūnosuke Akutagawa, while Bram urges her to run away. Aya attempts to seek help, though Akutagawa soon strikes with his ability.