Noa Himesaka, a main character in the series, is a happy and bubbly elementary school student standing 143 cm tall with blonde hair and cyan eyes. She constantly perceives herself as cute, influenced significantly by her mother, Emily Himesaka, who instilled this belief. This results in a pronounced superiority and inferiority complex, causing her to become downhearted when others, especially Hana Shirosaki, are deemed cuter.

Her character development centers on her relationship with Hinata Hoshino. Hinata's genuine admiration stabilizes Noa's self-esteem. While initially seeking broad validation for her cuteness, Noa gradually prioritizes Hinata's approval above all else. This shift manifests in specific behaviors: she shows vulnerability around Hinata, spending extra time selecting outfits, preparing sandwiches for their outings, and actively seeking Hinata's attention. Her feelings for Hinata include a crush, adding emotional complexity to their interactions.

A notable episode involves Noa dressing as Miyako Hoshino to comfort Hinata during distress over separation from her sister. While intoxicated by Hinata's resulting affection, Noa also experiences loneliness, recognizing the affection was contingent on her impersonation. This incident underscores her growing self-awareness and emotional maturity.

Her dynamics extend to others. She initially views Hana as a cuteness rival, fostering competitive feelings. Interactions with Miyako Hoshino, particularly during a visit to Miyako's university where an instructor praises Miyako's work, provide Noa perspective on Miyako's talents and kindness, leading to genuine respect.

Noa lives next door to the Hoshino sisters, facilitating her close involvement in their lives. Though her mother's reinforcement of her self-image as cute remains foundational, her experiences with Hinata and the group guide her toward a more nuanced understanding of validation and self-worth.