Motojirō Kajii

Motojirō Kajii (梶井 基次郎,) is a member of Port Mafia and has the ability Lemon Bomb.

Appearance
Kajii has a tall, slim build and short brown hair with bangs cut at an equal length across his forehead. His eyes are covered by orange goggles. He dons a worn out, white lab coat over a white button-down wrapped with a loose brown belt-like accessory. His coat has many pins, two on the left - one slightly larger yellow one with a face and a smaller black on with a red "X". On the right is an orange pin with an exclamation point, with metallic (bobby?) pins underneath. He also wears worn out, blue pants, a green scarf, and Geta (traditional Japanese wooden footwear).

Personality
Much like his lemon bombs, Kajii’s personality can easily be described as explosive. Kajii is an eccentric, obnoxious, arrogant man with a passion for science and an obsession with the shape of lemons. It is also heavily implied that he is religious, as evidenced by how he explains to Yosano upon first meeting her that both God and death exist but that neither of them can be overcome by science (chapter 7) as well as several statements that he makes during his confrontation with Margaret Mitchell and Nathaniel Hawthorne regarding God or the “admiral of the Universe” (chapter 20).

Ability
His ability, Lemon Bomb (檸檬爆弾,), prevents him from being harmed by any lemon-shaped bombs, which he makes himself.

Background
Much of Motojirō's past remains unknown, however, what is known marks a unique trait of his: theatrics. He is one of the few publicly known mafiosi of the Port Mafia,a wanted terrorist infamous for his murders of 28 citizens in an incident referred to as the Maruzen Building Bombing. Of course, Motojirō views it as one of his "experiments".

Little is known about Kajii’s past, but according to Yosano, he is a wanted terrorist bomber who is most well-known for blowing up the Maruzen Building and killing 28 ordinary civilians.

Armed Detective Agency vs. Port Mafia
Motojirō hijacks the train Akiko Yosano and Atsushi Nakajima board. Using the P.A. system, he sarcastically apologises for the "inconvenience" of a "physics experiment". His "experiment" involves how the passengers will "react" to a sudden explosion. He sets off explosives in the train, and assumes the explosion about two or three people. He cheerfully remarks the next experiment has powerful explosives in the first and last cars, enough to kill all the passengers.

He then addresses Atsushi directly, referring to him as the "main" test subject. He demands Atsushi surrender himself, or else all the passengers die.

Yosano proceeds to confront him, stepping into one of Motojirō's lemon bomb traps. After the explosion seemingly kills her, Motojirō mockingly greets her before saying "goodbye". He remarks slight surprise when she recovers, commenting on how tough modern women are. Yosano remarks it's more surprising such a "celebrity" of the Port Mafia, recalling Motojirō's reputation. At the mention of the Maruzen Building Bombing, Motojirō goes into an ecstatic tangent of how "wonderful" the "experiment" was. He happily views death as something to admire and study.

To Motojirō, "death" and "God" are the apex of science, and represent two concepts science has yet to overcome. His view of death as an "experiment" immediately puts him at odds with Yosano. He challenges Yosano, asking what "colour" her death is.

The first round of their battles ends with Motojirō having the upper hand, his onslaught of bombs overpowering Yosano. He gloats over her body, which is covered in broken glass and injuries. He stomps his foot on her back, mocking the Agency for not living up to their reputation. He pulls out a switchblade, informing Yosano she'll die soon. Before she does, he asks her an unsettling question: "What is "dying", exactly?"

He refers to his obsession with death as an academic interest, calling himself a "scholar". He lists methods of death, stating they're all reversible in a lab environment, but questions why death is, ultimately, completely unavoidable, asking why everyone has to eventually die. Yosano's mocks his inquiry, to which Motojirō asks what some girl from the Agency would know that he, a "lifelong" physics student, does not. Yosano affirms this, saying the answer is simple: he's an idiot.

Enraged, Motojirō stabs the switchblade through Yosano's hand, "thanking" her for the feedback. He drops several lemon-shaped bombs from his coat sleeves. He notes how people claim the brain can stay conscious up to eight hours after fatal blood loss. With a smile, he tells Yosano he'll ask her corpse how it feels to die. He abandons her in the conductor's car, telling her to "enjoy herself".

After the explosions, Motojirō returns to the car, noting the fire spread further than anticipated. The sight of Yosano's body slumped over the window excites him, and he goes to inspect his victory. Consequently, he falls for Yosano's ruse, punched hard enough in the face he flies back into the other side of the car. Shocked, he stutters how Yosano could survive. Yosano doesn't answer, instead asking which side of his face she just punched. Trembling, Motojirō points to the left side of his face. Yosano promptly punches the right side. He expresses his disbelief once more, listening to her admonish his view of "death" as the apex of science, condemning his callous view of life.

Motojirō remembers stories of Yosano's reputation, the Agency's physician with a rare healing ability. Right after explaining Thou Shalt Not Die, Yosano uses the ability on him, much to his fear. Yosano uses her ability several times to pry information out of him, leaving him dazed and shocked.

The Guild
Motojirō returns, having recovered from his defeat against Yosano, implied to have assisted in killing an assassin sent by the Guild alongside Black Lizard and Chūya Nakahara. When the Port Mafia's boss makes his entrance, Motojirō promptly bows and pays respect to him, a rare, grim look on his face.

Quotes

 * “The pinnacle of science is ‘God’ and ‘Death!’ Both exist in actuality, but neither can be overcome by science, which makes them all the more enthralling!”
 * (To Yosano Akiko) “Well then, what color will your death be, my lady?”
 * (To Nathaniel Hawthorne) “To you clergymen, your job may just be ‘to believe.’ But science is all about being perpetually dubious!”
 * “I’ve been up three nights in a row so into my research that in the end, I forgot to wear underwear!”

Trivia

 * He along with several other characters appeared in the mobile game Love Heaven as a limited time character.