Aika S. Granzchesta, a teenage heir from Aqua with piercing amber eyes, sports long hair initially woven into twin braids cascading as mid-thigh ponytails—a style altered to a pixie cut following a fire, later regrown into a small bun with front strands grazing her upper chest in adulthood. Her Himeya Company uniform adheres to red and white motifs, shifting seasonally between a cropped summer blouse paired with a slit dress and a winter cape-top layered over grey tights, always accentuated by crimson spherical earrings and a logo-emblazoned hat.

Sole inheritor of the Himeya legacy, she shoulders familial expectations while chafing at employee deference. Her sharp competitiveness and blunt nature fuel frequent interruptions to quash idealistic comments with the rebuke, “Embarrassing remarks are not allowed!” She openly idolizes Alicia, maintains quiet respect for her mentor Akira, and forges a close bond with Akari and Alice despite clashing temperaments.

Though fiercely proud of her undine expertise and privately yearning to join Aria Company, birthright duties anchor her to Himeya. Wrestling with self-doubt, she gradually accepts her role without dimming her rivalry-driven fervor. Physical transformations—post-fire hairstyle shifts—mirror emotional growth as she harmonizes obligations with ambitions, evolving from an uncertain apprentice to a poised professional whose resilience and craft dedication cement her journey into confident adulthood.