The original creator known as Azu is a Japanese manga artist whose professional career is primarily defined by the creation of the comedy series Magical Sempai. Very little verifiable information is publicly available about Azu's personal background, including their real name, date of birth, and place of origin, which is not uncommon for manga artists who work under a pen name.

Azu began serializing Magical Sempai, known in Japanese as Tejina Senpai, in Kodansha's seinen manga magazine Weekly Young Magazine on February 29, 2016. The series concluded its original run on February 15, 2021, and was subsequently compiled into eight collected tankōbon volumes. The story revolves around a high school student who becomes the reluctant assistant to a beautiful but severely stage-frightened upperclassman who is obsessed with performing magic tricks, despite her consistent and embarrassing failures.

The success of the manga led to a twelve-episode anime television adaptation produced by the studio Liden Films, which aired from July 2 to September 17, 2019. The anime adaptation brought the work to a wider international audience, with streaming available on platforms such as Crunchyroll. Following the conclusion of the Magical Sempai manga in 2021, Azu stepped away from the manga industry. Reports from early 2024 indicated that Azu had deleted their social media and Pixiv accounts, signaling a complete retirement from professional manga creation. This decision was reportedly linked to fan controversy over a commissioned piece of fan work that depicted characters from Magical Sempai in scenarios that many readers found inconsistent with the original story's tone and relationships. As a result, Azu has no announced current or upcoming manga projects, and their career as an original creator is effectively concluded.