Miku Hayasaka is a supporting character in the anime Love Love? She is the youngest member of the all-female cast of the Super Sentai–style television show The Super Transforming Cosmopolitan Prayers, or Cosprayers, performing the role of Dian Green Rayer, also known as Dian Iko. At eleven years old, she is notably younger than her fellow actresses. Physically, she has short black hair that falls to neck length, black eyes, and is often seen wearing a hairband, a dress, and tights.

Her personality is marked by both youthful energy and a specific vulnerability: she suffers from a fear of heights, which frequently causes complications during the acrobatic stunts required by her role. Despite her young age, she is a capable acrobat and performs as a member of the sentai team. Miku is aware that the show's writer, Naoto Ooizumi, is the secret scriptwriter, but she does not harbor romantic feelings for him. Instead, her affection is directed toward the show’s producer, a man the cast nicknames Dracula. This lack of interest in Naoto sets her apart from several other actresses who are drawn to him.

In the story, Miku’s role is primarily that of a supporting cast member of the Cosprayers show, contributing to the comedic and ecchi elements of the series. One of her recurring traits is a habit of inadvertently exposing her underwear in public, a running gag typical of the show’s tone. Her development is limited, as she remains a side character who interacts with the main cast largely within the context of the production. Her key relationships are with her fellow actresses and the production staff, particularly the producer she admires. Her notable abilities include her acrobatic skills and her ability to perform as the Green Ranger in the sentai series, despite the challenges posed by her acrophobia.