Nagi Aoe

 Warning: This page contains major spoilers for the Boy's Abyss series. Please read at your own risk.

Nagi Aoe is one of the female protagonists of Boy's Abyss, alongside Chako.

She was a former idol, and a member of an idol group called "Acrylic." She recently moved to Reiji's town with her husband, Kosaku Esemori, so that she can take care of his sick mother. She worked as a convenience store clerk while living in Reiji's town. She tries to commit double suicide with Reiji Kurose, but failed due to Yuri Shibasawa's interference.

Appearance
Nagi is a beautiful girl with two moles under her left eye, straight dark hair, and bangs. Her figure is tall, slender, and curvy. Her hair and eyes are usually depicted as dark blue in colored art, and her skin is pale.

Nagi's uniform while working at the convenience store is a striped collared shirt, black jeans, and a cap. When she's off-duty, her casual wear usually consists of a neutral shirt, a large black jacket, jeans or other pants, and sneakers. Nagi's signature outfit as an idol consists of a very shortly cropped frilly shirt with a bow, along with a frilly pleated skirt to match. She is depicted in various idol outfits throughout the series, all usually skimpy and feminine.

Personality
Nagi's persona as an idol was cheerful and personable. She was the most popular member of Acrylic, and had many fans, including Reiji and Sakuko. As Reiji gets to know her, however, this persona is revealed to be a façade. The true Nagi is depressed, apathetic, and directionless. Her only true will is to die in a lovers' suicide with anyone willing to accept, but all her attempts thus far have failed.

As Esemori said to Reiji, "She doesn't know how to live. She only knows how to drift, like a corpse on water, who needs someone to paddle her." This aimlessness is part of the reason she agreed to marry Esemori: so that she can comply with his orders and gain a sense of direction through him. Nagi originally took interest in Esemori because of his novel "Spring's Coffin," but upon realizing he had no true intention to die, this interest quickly dissipated. Their marriage is only in name, and the two spend little to no time together.

Nagi is a heavy smoker, potentially due to her lack of will to live. Very little has been revealed about her past thus far, and as such, she has remained a somewhat mysterious and enigmatic figure throughout the series. She is currently living in Tokyo again after rejoining Acrylic, and no other characters have heard from her since.

Reiji Kurose
Before they met, Reiji was familiar with Nagi's work as an idol through Chako. She moved to Reiji's hometown because Esemori's mother lives there, and the two met by chance while she was working at a local convenience store. Only days after meeting, Nagi proposes a lovers' suicide with Reiji. The two share a similar lack of direction and will, so Reiji agrees. This attempt fails, and serves as the catalyst for most of the events of the manga. Reiji's closeness with Nagi results in endless drama, as Chako, Gen, and Shibasawa all have feelings for Reiji. Though Reiji engages with all of these characters romantically due to his extreme lack of will and agency, Nagi always remains in the back of his mind, and he continuously falls back on her. Reiji's feelings for Nagi appear to be somewhat one-sided, though this is yet to be confirmed. Nagi is willing to entertain these feelings through acts of intimacy with Reiji, but she mostly seems to view him as a means to a (literal) end.

Kosaku Esemori
Nagi met Esemori by work connection. He told Nagi that she didn't have vanity and narcissism to be an idol, and asked her to quit and be his wife. Nagi accepted the offer, because she is willing to comply with almost any orders given to her. Even though they are married, they never do things that most married couple do. Esemori onlt married her so that he can pass the responsibility of caring for his sick mother on to her, but Esemori's mother did not want anybody's care. Nagi eventually returned to Tokyo after Esemori no longer had use for her, and resumed her idol activities there.

Chako
Nagi took interest in Chako after Reiji told her that she is a fan of both Acrylic and Esemori's works. Chako is indeed a big fan of Acrylic and Nagi, but she is deeply jealous of Nagi due to her relationship with Reiji. She fears that Nagi and Reiji will go through with their plan to commit suicide together. She makes a contract with Reiji forbidding them to die, and upon sharing this contract with Nagi, she accepts it. Due to Chako's severe inferiority complex surrounding Nagi, she goes through a dramatic upheaval in both appearance and personality. After disappearing from Reiji's life for several months, she returns having lost a drastic amount of weight, a similar haircut to Nagi's, and given up on all of her ambitions.