Asako Shibasaki serves in the Library Defense Force at the Kantō Library Base, rising from her initial position to become Chief Librarian. She operates within military intelligence as a skilled informant, adept at gathering information through networks and undercover operations. Her striking appearance draws considerable male attention and occasional jealousy from female peers, which causes her discomfort when others focus solely on her looks. In high school, her blunt and sarcastic nature led to social rejection, prompting her to adopt a sociable exterior that masks her true feelings. This defensive strategy fostered a deep wariness of trusting others. Her friendship with her roommate Iku Kasahara proves pivotal; she mentors Kasahara, using a study method that involves giving candy for incorrect answers, and gradually lowers her emotional barriers. Despite her reluctance to trust, she comes to see Kasahara as a genuine friend. In romantic matters, she is initially attracted to Atsushi Dojo because he seems unaffected by her beauty, but she confesses and is rejected. Later, she develops affection for Hikaru Tezuka, a fellow member of the Library Task Force. As part of the elite Task Force, she plays a critical role in protecting the author Kurato Tōma from the Media Betterment Committee. She confronts Satoshi Tezuka, Hikaru’s brother, with a direct proposal that he become an anti-censorship advocate in the National Diet, a tactical move to neutralize his interference.