The Akutagawa family

A 20-year-old man. Akutagawa has a slender build and very pale skin. He has short, black hair. Two longer strands frame the sides of his face. Near the tips, the black fades to a dirty white. His bangs are short, leaving his forehead almost completely exposed. Akutagawa has deep-set, narrow eyes. He rarely smiles, giving the impression of a perpetually sullen person.

He wears a long, three-layer shirt over tapered black trousers. Each layer is cut loosely, creating a "valanche" effect. He wears a white jabot over the collar of his shirt. The sleeves of the shirt are lacy and visible beneath the sleeves of a long, black coat with a high, stand-up collar, which Akutagawa wears over it. Because he doesn't tie a belt, it hangs loosely at the back and sides. He wears black, classic low-heeled shoes.

Ryunosuke Akutagawa's ability to transform his cloak, as well as any other clothing, into space-consuming material. In addition to slicing space, strips of Rashomon cloth can transform into extremely sharp blades, which can be used to block attacks and then capture the target.

Akutagawa, the "Dog" of the Port Mafia, lives by the principle of "survival of the fittest." He is ruthless, quick-tempered, and intimidating to his subordinates. He is aloof, but easily angered. He grew up an orphan in the slums of Yokohama; meeting Dazai at 14 changed his life, but not his philosophy. He strives for Dazai's approval, which leads him to despise his new student, Atsushi. While cruel, he is honest and warm to his younger sister, Gin. Akutagawa has a warm and friendly relationship with his younger sister, Gin—he helps her in everything and shows concern for her. For example, after being rescued by Higuchi and the Lizards, he apologizes to Gin for the trouble they caused, demonstrating a softer side to his character.

An 18-year-old girl, Gin is short in stature with pale skin, dark gray eyes, and long black hair. At work, she keeps her hair in a spiky bun, leaving one strand loose. Most of her hair falls over the right side of her face, while a strand falls over the middle. Gin wears a gray short-sleeved shirt, black pants, and black heeled boots. Over the shirt, she wears a long, flared black coat, under which is an outfit consisting of a long black hooded cape with frayed trim. The right sleeve, cinched with a black ribbon at the bicep, is long with an extended portion with frayed trim, while the left sleeve appears to be torn off, exposing her arm. She wears reddish-gray gloves that reach just above the elbows. The right glove is full, while the left glove is fingerless. In addition, she also wears a black necklace with a white cross on it and a white mask that covers her nose and mouth.

Her casual attire is much more feminine. She leaves her hair completely loose, revealing its silky, slightly wavy length, reaching below her waist. She wears a light, knee-length dress, black stockings, heels, and a stylish buttoned coat. Gin also carries a handbag. Many say she's a very beautiful woman.

Gin is silent and secretive. She is described by Tachihara as capable of sneaking up on someone and slitting their throat in an instant. Gin is also loyal to the mafia and is not above going toe-to-toe with anyone who goes against orders. As befits an assassin, Gin is taciturn, rarely speaking, and her silence is accompanied by either an indifferent or serious expression. However, silence is not self-control. Like her brother, she is quick to lash out. She has a very sweet voice. When it comes to others, it turns out she prefers to keep this side of herself to herself and dislikes being put in an awkward position.

She is very close to Akutagawa, smiling tenderly at him and returning home with him after returning from a mission.