Nayuta Asōgi (朝生祇なゆた), one of the four main characters in the series, is a 19-year-old university student. She possesses long blond hair typically styled in twin ponytails and chocolate brown eyes. Her standard attire consists of a beige top with a mint collar, a matching skirt, and brown shoes. She stands 170 cm tall, weighs 66 kg, with measurements of 90-64-88, has blood type B, and was born on February 5.

Her personality is soft-spoken, carefree, and consistently calm. She maintains a pleasant demeanor, actively seeking positive aspects in negative situations, an optimistic outlook defining her interactions and approach to challenges.

As part of the comedy duo RDeco (R凸) with Rin Araya, Nayuta serves as the "idiot" (boke) counterpart, contrasting Rin's "straight man" (tsukkomi) role. Their partnership began in middle school and continues into university, with Rin frequently responding physically to Nayuta's comedic antics, reflecting their established dynamic.

Balancing her comedic aspirations with daily life, Nayuta works part-time at The Baron restaurant alongside Rin, Fubuki Kitakaze, and Mafuyu Kogarashi. Her shifts often follow school and comedy activities, such as leaving the cafe for work directly after festival discussions. She also visits Rin's home to assist with academic assignments, indicating their close friendship beyond comedy.

Nayuta shares the central philosophy with her fellow comedians that "laughter makes people happy, and if everyone is happy, I'm happy." This drives their collective goal to perform at Osaka's Nanba Grand Kagetsu Hall, honing routines through small-scale performances in Shibuya while navigating part-time work and personal commitments.