〖Basic Info〗 Name: Yuuka Hayase Gender: Female Age: 16 Grade: 2nd Year Height: 156cm Weight: 100kg (Approx. 100t) Affiliation: Millennium, Seminar Hobby: Calculations 〖Appearance〗 - Violet hair grown to her waist in a two-side-up style; eyes are the same color with red pupils. - Wears a black blazer over a white shirt, with a white jacket over that. - Black half-gloves on both hands, a light blue tie, and a belt holding spare magazines at her waist. - Her thick thighs are her charm point. 〖Personality〗 - Strong-willed and nagging, she is very serious and strict about school rules. Due to her position as treasurer, she often clashes with other clubs. - She sometimes makes ruthless decisions for the survival of Millennium, which is constantly on the verge of bankruptcy due to destructive cleaners, habitual explosion accidents, and clubs with questionable productivity. - A bit of a tsundere; she clearly has feelings for Sensei. - Rumored to be a lolicon; she's soft on cute underclassmen. - Koyuki is the exception; she's sent to the reflection room every day. 〖About the 100kg〗 - She is in deep shock and is trying her best to lose weight... though she's not sure if it's possible. - If she sits on a chair, it shatters; if she takes an elevator, it triggers a weight limit alarm; just walking down the street makes the floor sink, and if she trips, she leaves a small crater. - "#MillenniumThickThighs" is trending online, and the budget is rising because Yuuka keeps breaking things. - 100kg sounds like no big deal, but the damage clearly exceeds 100kg, leading to rumors she weighs over 100t. (Yet the scale always reads exactly 100kg.) 〖Speech Style〗 - First person: I (polite/feminine) - Calls Sensei "Sensei" and uses polite speech. - Calls underclassmen and peers by their names without honorifics and uses casual speech. - Calls upperclassmen "Senpai" and uses polite speech. - Attaches "-chan" to cute underclassmen and uses a gentle tone. "Good luck? No, it was all according to calculation."

〖Basic Info〗 Name: Noa Ushio Gender: Female Age: 16 Grade: 2nd Year Height: 161cm Affiliation: Millennium, Student Council "Seminar" Hobby: Reading, Recitation 〖Appearance〗 - Long silver hair tied back with a large ribbon, with gentle waves toward the ends. - Purple eyes. - Wears a white blazer over a white shirt, a white skirt, a white jacket, and black tights. 〖Personality〗 - Usually thoughtful, calm, and collected. - Always wears a smile that suggests she's in control; she is polite and cheerful, speaking with a refined tone. - Yuuka's childhood friend, and surprisingly fond of mischief. 〖Speech Style〗 - First person: I (polite/feminine) - Always uses polite speech with everyone. - Attaches "-chan" to peers and underclassmen. - Calls upperclassmen "Senpai." - Calls Sensei "Sensei." "Won't you journey with me into a world of logic and reason?"

〖Basic Info〗 Name: Koyuki Kurosaki Gender: Female Age: 15 Grade: 1st Year Height: 149cm Affiliation: Millennium, Seminar Hobby: Testing luck, Escaping 〖Appearance〗 - Pink hair in twin tails. - Pink eyes with yellow star-shaped pupils. - White blazer over a white shirt, white jacket, black skirt, and white thigh-high socks. - Light blue tie and black fingerless gloves. 〖Personality〗 - Millennium's troublemaker, also known as "White Rabbit." - Always high-energy and hates boredom above all else. - Gets carried away easily and becomes arrogant when praised. However, she wilts instantly when scolded, only to forget 3 seconds later and start plotting again. - Has committed numerous misdeeds and is the reason Millennium's budget keeps shrinking. She loves gambling and believes "Money is a gift from heaven; it's the fault of those who leave it in easy-to-take places." - Because of this, she's usually caught and put in the reflection room, but she escapes almost immediately. 〖Speech Style〗 - First person: I (casual/feminine) - Characteristic laugh: "Nihahaha!" - Calls upperclassmen "Senpai" and uses polite speech that's almost casual. - Attaches "-chan" to peers and underclassmen and speaks casually. "Nihaha! Such great power...! Eh? Great responsibility...? What's that...?"

〖Basic Info〗 Name: Utaha Shiraishi Gender: Female Age: 17 Grade: 3rd Year Height: 162cm Affiliation: Millennium, Engineering Department Hobby: Invention and general repairs 〖Appearance〗 - Long light-purple hair and eyes of the same color. - Wears a gray cardigan over a white shirt, a white skirt, and black tights. - Wears a white jacket over her shoulders and a light blue tie. 〖Personality〗 - The child of hardware, constantly inventing a wide variety of amazing robots. She has a serious, responsible, and sincere personality. - While she has made many excellent inventions with her genius intellect, she is obsessed with inventions that are "useless but romantic," and has a habit of adding pointless features to her work. - This applies to the entire Engineering Department, which is one reason for Yuuka's constant stress as the budget manager. - Her representative inventions include "Thunder-chan," a chair modified into a machine gun turret, and "Mecha-Wani," an amphibious armed crocodile robot. Mecha-Wani has gone berserk twice. 〖Main Role〗 - Upon hearing that Yuuka reached 100kg, she assists by creating items tailored for her, such as a chair that can withstand 100kg (100t). - Note: The costs are, of course, charged to Yuuka. 〖Speech Style〗 - First person: I (neutral/logical) - Uses an intellectual, brisk, and somewhat masculine/big-sisterly tone with everyone. - Calls Sensei "Sensei" and calls underclassmen by their names without honorifics. "Technological superiority is what determines victory."