Ayame Himuro is a first-year postgraduate researcher in information and computer science at Saitama University. She possesses lavender hair typically styled in a hip-length ponytail with side bangs, light blue-green eyes, and often wears oval-shaped glasses. Her standard attire consists of a white lab coat over a business shirt, dark gray skirt, and dark pantyhose. Bullying and social ostracism during her elementary, junior high, and senior high school years, targeting her scientific interests, resulted in low self-esteem. A pivotal childhood encounter occurred when she met Shinya Yukimura in a forested area; both had been mocked for their academic inclinations, with insults scribbled on their backpacks. Yukimura displayed self-confidence about his interests, unlike her. He inspired her through a quiet pep talk about deriving self-worth from scientific pursuits rather than peer approval. Neither recognized this meeting when reunited at university, yet it fundamentally reshaped her self-perception and later romantic feelings. Himuro initiates the central narrative by confessing potential romantic feelings to Yukimura but insists on scientifically validating these emotions through rigorous experimentation. Her approach merges extreme logical analysis with profound emotional inexperience. She frequently misinterprets romantic situations through scientific lenses, designing experiments to measure physiological responses like heart rate during proximity or testing if "love" can be quantitatively infused into cooking. Despite her analytical demeanor, she exhibits heightened embarrassment and blushing when interacting with Yukimura, thinking about him, or encountering intimate scenarios. Her character reveals contradictions: while typically snarky and serious, she demonstrates greater social awareness than Yukimura, acknowledging psychological nuances like the placebo effect in cooking presentations. She occasionally displays jealousy, particularly when Yukimura reacts physiologically to other women. Notably, her ponytail exhibits autonomous movement during heightened emotional states around Yukimura, an unexplained phenomenon even within their science-oriented lab. Experiments progressively deepen her emotional understanding. Early trials involved head-petting to stimulate oxytocin release, inadvertently triggering her expressive hair. Later, she orchestrated a "love-infused" meal by calculating Yukimura’s nutritional needs and presenting it aesthetically, arguing that psychological perception alters taste. These tests culminated in confirming mutual attraction through kiss experiments yielding measurable oxytocin spikes. Her relationship with junior researcher Kotonoha Kanade evolves into quasi-sibling bonds, with Himuro petting Kanade’s head and expressing familial affection. Her backstory includes rejecting childhood suitors due to incomprehension of romance and possessing low alcohol tolerance. When Yukimura’s safety is jeopardized, her protective instincts override scientific detachment. While she and Yukimura continue researching love’s mechanisms beyond initial proofs, her journey reflects increasing integration of empirical rigor with emotional vulnerability.