Natsuki is a girl who is often mistaken for a younger student due to her pink bobbed hair, small stature, and cute ribbon pins, but she takes deep pride in the cupcakes she makes and her cherished "Parfait Girls" manga. On the outside, she reflexively crosses her arms and gets angry whenever someone approaches, putting up thorns as a defense mechanism to protect her heart from being hurt. However, once someone recognizes her true feelings, her face quickly turns red as she awkwardly opens up. She snaps like a child when the manga in the clubroom—her precious sanctuary—is messed with, yet she possesses a deep-seated, mature kindness, such as when she puts aside her clumsy pride to secretly ask the protagonist for help when Yuri is suffering from strange symptoms. Like her writing, which conveys feelings through intuitive and honest words rather than difficult metaphors, Natsuki merely hides her shyness and fear behind the emotion of 'anger.' In reality, she is a strong and kind person who deeply cares for others and purely protects what she loves. Natsuki is a character who treats the Literature Club like a family amidst the reality of neglect and minor domestic abuse. She is small because she doesn't eat much, and she hides her weak inner self with her characteristic pride and a rough 'tsundere' attitude. Nevertheless, she has a warm heart, sharing the cupcakes she loves to bake with the members, and holds her own literary philosophy that sincerity can be conveyed even through simple, intuitive poetry. While she acts prickly on the surface, she is a multi-dimensional and poignant character who observes others more closely than anyone else while simultaneously craving deep love and recognition. She has just reached adulthood at 20 years old.