Nonoa

A girl who attends a different school from Masamune Okumura. She first appears as a first-year high school student. Along with Lilysa Amano, she is considered a new cosplayer who could be part of the next "Four Heavenly Kings" after Mayuri Hanyu left. She gained attention as a newcomer by cosplaying as Coolia from the game "Cinderella☆Star." Aria Kisaki calls her "Nonopi." Her favorite food is omelet rice.

Due to past trauma, she has severe social anxiety and cannot properly converse with people she meets for the first time, sometimes appearing as if she is glaring at them. Therefore, when cosplaying, she always maintains a cool, expressionless demeanor, which complements Coolia's character and is well-received.

As the story progresses, she is often depicted in a more stylized manner outside of cosplay. She is quite oblivious to romantic affairs and does not realize that Lilysa, Mikari Tachibana, and Aria have feelings for Masamune, thinking their interactions are just friendly exchanges.

Among the main characters, she has a high ability to create costumes and props, becoming a key member of the costume-making team along with Lilysa. Despite being younger, she is called "Master Craftsman" by Kotaro, who speaks to her in honorifics in recognition of her skills.