Airi Sakura is a student at Tokyo Metropolitan Advanced Nurturing High School, initially placed in Class D before being promoted to Class 2-D at the end of her first year. She stands 153 centimeters tall with long pink hair typically styled in low twin pigtails, gradient blue eyes, and a well-endowed figure that she often conceals through slouching and plain clothing. She wears red glasses that are later revealed to be fake, adopted as a disguise to avoid standing out. Her student ID is S01T004738, and her dormitory room is 1106. Before enrolling, Airi worked as an online gravure idol and print model under the stage name Shizuku, gaining a significant following on the internet. She carries a digital camera and enjoys photography, including taking self-portraits for her idol activities. Airi is defined by extreme shyness and social anxiety, struggling to communicate with others, avoiding eye contact, and initially having no friends. Despite this, she is kind and benevolent, and she possesses a sharp intuition that allows her to sense the hidden, malicious nature beneath Kikyo Kushida’s friendly exterior. After being rescued from a stalker by Kiyotaka Ayanokoji, she discards her fake glasses, embraces her true appearance, develops romantic feelings for him, and gains the courage to join the Ayanokoji Group, where she forms a close friendship with Haruka Hasebe. Her Overall Ability Assessment scores are among the lowest in her class, with a D+ overall rating, including low marks in physical and thinking ability. During a second-year special exam requiring the class to vote on an expulsion, Kiyotaka advocates for expelling the student with the lowest OAA scores, and Airi is expelled. Before leaving, she uses her private points to purchase a maid outfit, which she leaves behind for her friends. After her expulsion, she continues her career as a gravure idol, restarting her activities under a new account and demonstrating newfound independence and resilience.