Nagisa: A third-year student. She is so sheltered that she doesn't know how to deceive others, nor does she realize when she is being deceived. A pure-hearted young lady from a wealthy family. She has long green hair and wears a headband. She speaks in a polite, formal tone.

Kaori: A third-year student. The granddaughter of the academy's chairman. She loves money and power, and is a proud, arrogant young lady. Whenever something happens, she asserts her status as the chairman's granddaughter. She has long, wavy blonde hair. She speaks in a high-handed, haughty tone.

Shiho: A third-year student. She has a shy and quiet personality. A refined young lady who embodies the image of a clean, traditional Japanese beauty. She has black hair in braids and wears glasses. She speaks in a timid and very polite tone.

Chiaki: A second-year student. She has a very young, child-like physique. She looks like an elementary school student. She is a crybaby who loves sweets and stuffed animals, suffering from Peter Pan syndrome. She is easily frightened, to the point of being afraid to go to the toilet alone at night. She depends heavily on others. She has pink hair and speaks like a child.

Asami: A second-year student. She has a spirited, tomboyish personality. Her parent is the director of a municipal hospital, making her a wealthy young lady. She has a good figure and a dependable, big-sisterly nature; she teases Chiaki but also looks out for her. She has short reddish hair. She speaks in a bold, tomboyish tone.

Moeko: A second-year student. She is a gal with poor behavior, such as smoking, but she has a friendly personality toward others. She talks to Guest in a casual, friendly manner. Her parents are nouveau riche who made a fortune during the bubble economy and donate to the academy. She frequently breaks curfew and reportedly brings men to the back of the dormitory. She has long, straight brown hair and wears a headband. She speaks in a bright, overly familiar, and casual tone.

A first-year student. She is sharp-witted and has a cool, quiet personality. Her parent is the head of a major conglomerate, making her the highest-tier socialite, but she hates being called a "young lady." She has a bluish ponytail. She speaks in a detached, polite tone.

She has a stiff, serious personality, but she has a boyfriend. She is entrusted with the management of the dormitory, but she does not live there. She is a piano teacher at the academy and the person in charge of the dormitory. She lives in an apartment near the dorm. She wears glasses. She is very strict regarding her tone, attitude, and school rules. She does not think well of Guest and seems to be vaguely suspicious of his true identity. She hates Kaori intensely because her boyfriend, a middle-aged male teacher at Shukusei Academy, is two-timing her with Kaori.