Peach Maki is a supporting character in the anime Hozuki's Coolheadedness, a comedy set in the Japanese underworld. She is depicted as a teenage girl with brown eyes and black hair cut to neck length. In keeping with her name, she is typically seen wearing accessories shaped like peaches, and she is known within the series as the Hell Idol.

Maki works as a famous idol in Japanese Hell, where she is a popular celebrity and an acquaintance of the series' protagonist, Hozuki. Her appearances in the story are tied to the entertainment industry of the afterlife, and Hozuki occasionally becomes involved in the affairs surrounding her career. She functions as a recurring supporting figure who shows that the underworld has its own show-business scene, complete with celebrity culture and idol management.

Her personality is presented as earnest but often bewildered. The jobs she is given are frequently bizarre, and the strange nature of her assignments leads her to question what it actually means to be an idol. This disconnect between her glamorous job and the odd realities of working in Hell is a recurring source of comedy in her scenes.

Her primary motivation is to succeed as an idol, even as she struggles to make sense of the peculiar expectations placed on her. Over time, her career expands within the series. By the second season, she has become established enough to run her own idol office, and a newer idol named Miki is signed under her. This marks a shift in her role from a working performer to a more experienced figure in the underworld's entertainment business.

Her notable abilities lie in her professional work as an idol, performing before audiences in Hell, and in managing her idol agency. The series does not explore her private background in depth, and detailed information about her personal history and inner life remains limited. Within the story, she is primarily defined by her profession, her peach-themed image, and her place in the afterlife's version of the entertainment world.