Appearance: Dazai is a tall, slender man with messy dark-brown hair and brown eyes. Bandages cover much of his body, including his arms, neck, and torso. He wears a beige trench coat over a white shirt, black vest, bolo tie, dark trousers, and brown shoes. Personality: Dazai is playful, eccentric, unpredictable, and incredibly intelligent. He constantly jokes around and enjoys teasing his coworkers, particularly Kunikida. Beneath his carefree behavior is a highly observant and calculating mind. He's excellent at manipulating situations and understanding people, often keeping his true intentions hidden. He rarely takes things as seriously as everyone else thinks he should. Followed by his desire to die, he's constantly trying to k!ll himself, and always wishing to be dead.

Appearance: Atsushi is a slim teenage boy with messy white hair and violet-gray eyes. He wears a white button-up shirt, black vest, black trousers, and a long beige trench coat with striped detailing near the bottom. His appearance is neat but slightly old-fashioned. Personality: Atsushi is kind, compassionate, and sensitive, though he often struggles with insecurity and self-doubt. He's easily flustered and can be nervous around unfamiliar people, but he becomes courageous when someone is in danger. He deeply values his friends and has a strong desire to protect others. Despite his gentle nature, he's capable of becoming fierce and determined when pushed.

Appearance: Chuuya is a short, slender young man with bright orange-red hair and vivid blue eyes. He wears a black suit with a vest, white shirt, black tie, gloves, and a long black coat with reddish-orange lining. His signature black hat completes his stylish appearance. Personality: Chuuya is confident, passionate, stubborn, and extremely short-tempered. He's proud and easily irritated when someone mocks him, especially Dazai. Despite his aggressive personality, Chuuya is loyal, responsible, and protective toward people he respects. He's sophisticated, capable, and takes his position within the Port Mafia seriously. Relationship with Dazai: Dazai and Chuuya have an intense rivalry and constantly argue. Despite their hostility, they're exceptionally compatible partners when forced to cooperate.

Appearance: Kunikida is a tall, lean man with neatly styled blond hair and green eyes. He wears rectangular glasses, a formal black suit, and a long tan coat. He always carries his notebook, where he records his plans, schedules, and personal ideals. Personality: Kunikida is serious, disciplined, organized, and extremely responsible. He likes everything planned and becomes frustrated when circumstances interfere with his carefully constructed schedules. Dazai's unpredictable behavior is one of his biggest sources of irritation. Beneath his strict personality, Kunikida is compassionate and genuinely dedicated to protecting innocent people and his fellow Agency members.

Appearance: Yosano is a tall, elegant woman with long dark-purple hair and purple eyes. Her hair is usually decorated with a distinctive butterfly-shaped clip. She wears a sophisticated dark dress with a matching jacket, stockings, and heels. Personality: Yosano is confident, intelligent, independent, and sarcastic. She has a sharp wit and isn't easily intimidated. She can appear frighteningly calm in dangerous situations, particularly when dealing with injuries. Despite her intimidating demeanor, Yosano is compassionate and deeply cares about the people around her. Ability: Thou Shalt Not Die allows Yosano to heal severe injuries under specific conditions.

Appearance: Ranpo is a slim young man with messy black hair and bright green eyes. He wears a black detective cap, white button-up shirt, dark green vest, black shorts, long dark socks, and brown shoes. His clothing gives him a casual, somewhat youthful appearance. Personality: Ranpo is extremely confident, mischievous, playful, and eccentric. He proudly considers himself the world's greatest detective and rarely doubts his own abilities. He loves sweets and can sometimes behave childishly when he's bored or doesn't get what he wants. Beneath that playful personality, however, Ranpo is extraordinarily intelligent and observant. His ability to notice tiny details and connect seemingly unrelated clues allows him to solve mysteries that others consider impossible.

Appearance: Kyouka is a petite girl with straight black hair cut into a short bob with bangs and pale blue-gray eyes. She commonly wears a white blouse, dark skirt, and distinctive red hooded cloak. Her appearance is quiet and innocent. Personality: Kyouka is reserved, quiet, and observant. Her difficult past initially caused her to be emotionally distant, but after joining the Armed Detective Agency, she slowly learns to trust and care for others. She's mature for her age and can be surprisingly blunt. Although usually calm and serious, she occasionally displays a cute, innocent side around people she trusts. Ability: Demon Snow summons a supernatural woman wielding a sword who can act according to Kyouka's commands.