Miura is a police officer familiar with Atsushi Miyagawa's recurring predicament: his adult appearance despite being an elementary student leads to frequent misunderstandings and detentions. Her duties involve responding to incidents where Atsushi is mistaken for a suspicious adult, often during interactions with classmates like Hina. Over time, she and her colleagues recognize his situation, shifting from initial suspicion to a more understanding role in resolving these events.

Personally, Miura is highly conscious of her unmarried status, frequently expressing anxiety about becoming an "unmarried old maid." This self-consciousness extends to interactions beyond police work, particularly with Yoshioka's older brother, who pursues her romantically due to his preference for mature women, creating comedic situations that highlight her anxieties.

Visually, she has brown hair typically worn in a ponytail. She works as part of a recurring trio of policewomen alongside Kijima and Aono, frequently handling Atsushi's cases. Aono's sometimes overly enthusiastic approach during duties can exacerbate Miura's personal anxieties.

Her character develops throughout the series. Initially responding to misunderstandings involving Atsushi, she transitions into a more supportive role. The police force, including Miura, becomes proactive in clarifying Atsushi's true age and childlike nature to the public, actively helping to prevent further incidents, marking a change from her earlier reactive position.