Oyuki Konno is a Japanese novelist and the original creator of the long-running light novel and anime series Maria Watches Over Us. Born in Tokyo on June 2, 1965, Konno began her professional writing career after a period of employment in a bank, a job she held for seven years. Her debut work, Yume no Miya, was submitted to the Cobalt Novel Grand Prize, winning both the 21st edition of that award and the Cobalt Reader's Grand Prize for the first half of 1993.

Konno is best known as the author of the Maria Watches Over Us series, known in Japanese as Maria-sama ga Miteru. The light novel series, which features illustrations by Reine Hibiki, began publication in Shueisha's Cobalt magazine in 1998 and continued until 2012, spanning 37 volumes. The story is set in a Catholic girls' school in Tokyo and follows the relationships among students connected through a traditional soeur, or sister, system. The series proved highly popular, with over 5.4 million copies in circulation, and is widely recognized for its influence on the yuri genre, helping to establish many of its modern tropes and conventions.

The commercial and critical success of the light novels led to a substantial multimedia franchise, including multiple anime adaptations. The anime series, produced by Studio Deen, aired in four seasons between 2004 and 2009. Konno is officially credited for her work on these adaptations. For the first two seasons, Maria Watches Over Us and Maria Watches Over Us: Printemps, she is listed as the original story and script supervisor. For the third season, released as a five-episode original video animation series, she is credited as the original creator and also wrote lyrics for its ending theme songs. For the fourth and final television season, Konno is credited as the original creator and served in a supervisory role. Beyond the anime, her original story was also adapted into a manga illustrated by Satoru Nagasawa, which ran from 2003 to 2010.

Beyond her most famous work, Konno is also the author of other light novel series, including Yume no Miya and Suripisshu, as well as a stand-alone novel titled Sakana no Ten. Her career as a novelist began after she discovered that prose writing came more naturally to her than drawing, having initially aspired to be a manga artist in her youth. Her significant contribution to Japanese popular culture lies in the creation of Maria Watches Over Us, a foundational text that shaped the development of school-themed yuri narratives for a generation of readers and viewers.