Ikuyo Himekawa is a high school student and classmate within the series. She stands 156 cm tall with a slim, pale build and measurements of 104-55-90 cm, featuring an M-cup bust. Her long, wavy white hair is styled with a center part, spiky bangs, curtained sides, and side hair. She has amber-colored, tareme-shaped eyes.

Characterized as quiet, serious, shy, and clumsy, she uses "boku" as her personal pronoun. Academically diligent, she maintains good grades and follows her parents' career path. She belongs to a friend group associated with Kaoru.

Her roles include serving on the Health Committee and participating in the Nurse Study Group club, where she wears a full nurse uniform, cap, and armband. Her wardrobe also includes a school uniform, Chinese dress, miniskirt, microskirt, thigh-high stockings, pantyhose, sports swimsuit, and accessories like belts, ribbon ties, and hair ribbons. She engages in nurse-related cosplay.

Her hobby involves appreciating horror films, though she frequently faints from fear while watching them. When she faints, she dives headfirst toward the nearest person, accidentally head-butting them, a persistent habit. She carries a ruler as a personal item.