Kunikida Doppo

Kunikida is a tall and slim young man with deep, green-grey eyes. His bangs are parted to the right and he has rather neat, but spiky golden-blond hair that ends in a long ponytail. He is always seen wearing his glasses.

His attire consists of a beige vest over a black long-sleeved dress shirt, a red ribbon tied into a bow around the collar, beige pants, and plain brown shoes.

As a member of the Armed Detective Agency, Kunikida is very professional and diligent when it comes to his job, because to him, the reputation of the agency takes precedence over anything else. He constantly feels the need to organize, gather, and schedule everything, which is why he may come off as somewhat strict and harsh during investigations. Despite this, Kunikida is nonetheless a trustworthy and loyal detective upon whom many in the Agency rely on because of his authoritative capability and responsible nature, which is why he's deemed as the Agency's next-in-line to becoming its President.

He is almost never seen without his trademark notebook, which he believes to be an "ideal" and guide to life. He utilizes it for several reasons, such as data-gathering, planning, making the world a better place, and most importantly, a medium for his ability, The Matchless Poet.

Though he often appears calm and careful, Kunikida is also known for his exasperated outbursts, which are primarily caused by his partner, Osamu Dazai, who constantly vexes him with his suicidal attempts. However, Kunikida does not genuinely dislike Dazai. He acknowledges Dazai's skill and knowledge when first working with him, and he continues to entrust much of the Agency's strategies to Dazai.

He is also somewhat naïve and prone to easily believe Dazai's lies, including the "merit" of a noose when it comes to improving neck strength and that extreme shouting can cause hemorrhoids, which he later jots down in his notebook for future reference.

Kunikida values human life, as he strives to save all innocent people during dangerous events in Yokohama. He sticks to this belief after seeing young people injured or killed in front of him. As a result, Kunikida never thinks killing his opponents is the only option, and constantly looks to solve problems without bloodshed. Due to Kunikida's passion to try to protect the city and its people, Ranpo believes he is the strongest and most virtuous person in the Agency. This calm front begins to crack when he is forced to "bend the rules", resulting in a mental breakdown.

Kunikida deeply thinks about this statement, causing him to re-evaluate his ideals drastically, and he says that idealistic thought alone won't save lives and that they must choose to be more realistic. By the end, Kunikida makes a self-sacrifice, sticking to his desire to keep his comrades alive and telling Tetchō Suehiro that he "won't let anyone ruin his plans" and that he shall let his ideals soar with his "life as fuel".

From then on, Kunikida maintains his steadfast loyalty and faith in the Agency, more so when they reunited partially and fully to take on their formidable adversary together.

Kunikida's ability, Doppo Poet, allows Kunikida to make objects written on the papers of his notebook come into existence. However, it does not work on objects larger than the notebook. Such objects include wire guns, handguns, grenades, and flashbangs.

He is shown to be able to use pre-written notes as a means for his object summons, which can be especially convenient if one of his hands is bound and incapacitated. Also, he is able to remotely activate his ability, transforming pre-written notes into objects, which come in handy when supporting other members from afar.

Kunikida is proficient in martial arts, being able to restrain and overthrow people. With this, he also has enhance strength, being able to rip John Steinbeck's vines attached to his arm. Kunikida learn this skill from Fukuzawa to which he stated that he never once win against him..