Eri Ibusaki is a 17-year-old second-year high school student in Tokyo, known for her cool and serious demeanor. She sports long black hair with faded blue tips and bangs, along with distinctive purple eyes. Her typical outfit includes a dark pink cropped jacket, a see-through top, and a black Harajuku punk-style skirt featuring flower details. Dark pink lipstick matches her nails. She accessorizes with silver earrings and wears black platform heels paired with long see-through socks. Her height is 167cm, and her birthday is January 5th, placing her under the Capricorn zodiac sign.

Personality-wise, Ibusaki is reserved. She rarely smiles and tends to observe group discussions from a distance without actively participating. Academically, she excels as an honor student, maintaining excellent grades. Her father holds an executive position within the National Police Agency.