Gin Akutagawa is a member of the Port Mafia, acting as one of Black Lizard's battalion leaders. Gin has dark gray eyes and long black hair. As a mafioso, she keeps her hair in a spiked bun, leaving sections of shoulder-length hair down. Most of it falls to the right side of her face, whilst a strand falls over the middle. Gin wears a gray, short-sleeved v-neck, black trousers, and black heels. Over her shirt, she wears a long, flared black coat is seen dressed in an outfit comprising of a long black cloak with a hood and frayed trim. The right sleeve, tightened by a black band on her bicep, is long with an extended part with frayed trim, and the left sleeve appears torn off, exposing her arm. She wears reddish-grey gloves that extend a tad beyond her elbows. The right glove being complete whilst the left glove is fingerless. In addition, she also wears a black choker with a white cross on it, and a white mask that covers her nose and mouth. Her casual wear is much less elaborate. She leaves her hair completely down, showing it to be silky and a bit wavy, falling past her waist. She wears a light, knee-length dress, black stockings, heels, and a stylish, buttoned coat. She also carries a purse with her. She is quite feminine in this attire, and she's noted as being exceptionally beautiful. After being bitten by Higuchi, Gin has a vampiric appearance. As an assassin, Gin is silent and stealthy, described by Tachihara as being able to sneak behind someone and slash their throats in an instant. This was demonstrated when she snuck behind Higuchi and put a knife to her throat before she could notice. Fitting of an assassin, Gin is deathly quiet, seldom speaking, and pairs her silence with either indifferent or serious expressions. Similar to her brother, she's quick to lash out when provoked. Her fellow commander, Tachihara, has no problem antagonizing her, ending up as the target of her temper majority of the time. However, unlike her brother, her anger is often shortlived. Although she has a sense of humor, it's implied to be rather dry and sarcastic, such as writing "Congrats!" in the dirt to Tachihara when Atsushi forces him to hold a baby during the Q incident. Hidden beneath her stoic personality, she blushes easily when embarrassed such as when Osamu Dazai mentioned how she was a "dainty little girl" when she was younger and when Higuchi saw her in her civilian clothes. She is also noted to have a very cute voice. When it comes to others, it appears she prefers keeping this side of her to herself and dislikes being put on the spot over it. However, more recently, she has grown to become more comfortable with actually conversing with her coworkers and has also been shown to care about their wellbeing. She is closest to Akutagawa, smiling fondly at him and returning home with him after her return from a mission. After Akutagawa promises to Atsushi Nakajima not to kill anyone for half a year, Gin notices Akutagawa's increasing irritability, attempting to find ways to pacify him, but knowing his demeanor leaves much to be desired in terms of relaxation.