Akane Kobayashi is a student in Class 2A at Okitsu High School. Driven by a strong interest in earning money, she works a part-time job outside of school. However, she spends her wages rapidly on brand-name and trendy items. Mistakes at work frequently lead to wage deductions, causing ongoing financial instability.

She exhibits persistent concerns about her physical appearance, particularly her weight and body image. Despite weighing 50 kg, she repeatedly attempts crash diets aiming for 40 kg, efforts that consistently fail. A consequence of her dieting is a reduction in her bust size, worsening her insecurities. This makes her highly sensitive to discussions about her weight or chest measurements, often provoking strong reactions. On school measurement days, she tries tactics like holding her breath to alter results concerning her chest size, though without success.

Academically, she tends to sleep during class hours. Her demeanor includes moments of ditzy behavior, such as concluding she had woken up in America simply because she heard the American exchange student Anthony say "Hello" in English upon entering the classroom.

Her relationship with classmate Jyoji Seki involves frequent verbal clashes, with both often stating they dislike each other. Despite this surface tension, they maintain a functional rapport and interact regularly. She also demonstrates jealousy toward Rio Kitagawa's physique, reflecting her ongoing preoccupation with body image.

Her star sign is Aries.