Ichika Hashifuna originates from Kashiwa City in Chiba Prefecture, born on July 31st. She stands 142 centimeters tall, weighs 36 kilograms, and has blood type O. Academically, she demonstrates proficiency in mathematics, chemistry, and biology, while struggling with history and classical subjects. Unaffiliated with any formal school club, she belongs to the "go-home" club.

Driven by a powerful scientific curiosity, she actively investigates and verifies phenomena of personal interest, a tendency persisting despite external appearances suggesting otherwise. Her exceptional intellect is quantified by an IQ of 190, yet it coexists with notable eccentricity colloquially termed as having "one screw off," reflecting unconventional thinking patterns.