Nonoa, whose real name is Noa Ebisu, is a first-year high school student at a school different from the main cast. She is a talented newcomer in the cosplay world, known by the handle NONOA, and is considered a rising star alongside Lilysa, both of whom are seen as candidates to succeed the legendary cosplayer Mayura as part of the next generation of the Four Heavenly Queens of Cosplay. Despite her growing fame, Nonoa suffers from extreme shyness and has difficulty talking to new people, a condition that makes ordinary social interactions a challenge. However, when she cosplays, she undergoes a remarkable transformation: her expression becomes perfectly cool and unchanging, earning her the nickname "ice beauty" among fans. This contrast between her timid real-life demeanor and her flawless, controlled performance in costume is a defining feature of her character.

A highly skilled craftswoman, Nonoa excels at making cosplay costumes, a talent that compensates for her social anxiety by allowing her to contribute to the cosplay world through meticulous craftsmanship. Her motivation is driven by a strong emphasis on quality and external evaluation; she values the completion and polish of a performance above simple enthusiasm. This makes her a person who sets and maintains high standards, sometimes appearing strict or demanding when interacting with others. Her role in the story is to bring an outside, practical perspective into the manga club’s activities. She visits the club under the official pretext of joint practice, having arranged permission with both schools, and her presence introduces a more competitive, results-oriented mindset to the group's primarily passion-driven approach.

In terms of relationships, Nonoa’s dynamic with Lilysa highlights the contrast between passion-driven joy and evaluation-driven perfection. With Okumura, she shares a connection through craftsmanship and appreciation for detail, though their perspectives differ. With Mikari, another character attuned to external standards, she shares an understanding of the need to present results. Nonoa’s development involves gradually learning to balance her perfectionism with the warmth of friendship and shared experiences, moving from a purely results-focused individual to someone who can also appreciate the process and the people behind it. Her notable abilities include her expert costume fabrication and her extraordinary control over her facial expressions while cosplaying, allowing her to fully inhabit any character she portrays.