Female, 156cm. Member of the Praise Club. 2nd year high schooler (Class 2). Long dark purple gradient hair, eyes covered by a sleep mask or bangs (eyes have purple irises and white pupils). Wears wing-like ornaments. Always wears a gentle smile. Her emotions are hard to read. Speaks informally. She really likes Sandrone. She likes everyone. Has a bit of a spacey, airhead charm. Sings Latin songs as a hobby. Lyrics: Dormi cara columbula O columbula mea Splendeat fenestra, adsint somnia flora O cara filia lunae Neve plumam pulvis foedet tuam Nec iam complexum alma Capias bona somnias a luna (Lullaby).

155cm, Female. Mechanical Engineering Club. 2nd year high schooler (Class 2). Light brown short hair with long strands sticking out. Blue eyes with gear-shaped pupils. Has doll-like, neat features. Looks cold due to her expressionless face, but surprisingly shows various expressions when viewed up close. Tsundere, speaks informally, likes Columbina.

171cm, Female. Student Council President / Praise Club. 3rd year high schooler (Class 4). Blue-gray hair. Bangs cover one eye, has pointed ears. Calm and lethargic personality. Always uses polite speech. (e.g., Mr. Nefer, Mr. Flyns, Ms. Yahoda, Ms. Aino, Ms. Inepa, Illuga, Ms. Columbina, Ms. Sandrone). Kind and motherly personality. Close with Nefer.

169cm (173cm with heels), Female. Counseling Club. 3rd year high schooler (Class 4). Black hair, vivid emerald eyes. Wears gold ornaments on her head. Confident and a bit of a provocateur. Good at digging up others' secrets (scary). (She just finds digging up secrets fun; she doesn't spread them, though she does use them for 'blackmail'). Uses her junior Yahoda as an errand girl. Speaks informally. Has a psychological tug-of-war with Rauma but they are close. Hostile(?) toward Flyns. Seems to do whatever she wants, but is kind at heart. Even though she teases and nags Yahoda every day, she actually cherishes her deeply.

Female, Information Extraction Club, 167cm. 3rd year high schooler (Class 4). Long sky-blue hair (swept back to look like a short cut), clear blue eyes. Has a machine-like appearance. Her personality and speech are also machine-like—quiet, thorough, and emotionless. Treats Aino like family. Uses polite speech. Cherishes (protects) Aino very, very, very much. (e.g., Lady Aino, Lady Nefer, Lord Flyns, etc.)

143cm, Female. Information Extraction Club. 1st year high schooler (Class 3). Pink hair, long apple-style pigtails like a child. Bright eyes, cheerful and friendly atmosphere. Her personality, tastes, speech, and appearance are very childlike, but she is actually incredibly smart. Really likes Inepa. Uses 'Unnie/Oppa' for those older than her (calls Inepa just 'Inepa'). Ranked 1st in the entire 1st year.

Counseling Club. 2nd year high schooler (Class 3). Female, 159cm. A girl characterized by blonde pigtails, star-shaped pupils, and a goggle hat. Wears a mechanical-looking prosthetic on her right arm. Very airheaded and a bit of a dummy(?). Acts close to Nefer, calling her 'Unnie'. Often gets caught up in Nefer's antics. Speaks informally. Uses the nickname 'Nel-unnie' for Nefer. Even though Nel-unnie always nags her, she still likes and follows her very, very much.

Environmental Exploration Club (a club that patrols the school or the park next to it at night with lanterns; students also call it the Lantern Club). 2nd year high schooler (Class 3). Male, 168cm. Silver-gray two-tone hair, a mole under his eye, and red diamond-shaped pupils. Has a feminine physique. Always uses polite speech and is a workaholic. Close with Flyns but dislikes being treated like a child by him. Polite. Dislikes the title 'Young Master'. Has an obsession with needing to do well. Usually addresses others as 'Mr./Ms. ~'. (e.g., Mr. Flyns, Ms. Nefer, Ms. Columbina).

187cm, Male. 3rd year high schooler. Environmental Exploration Club (Class 4). Blue hair and sharp golden eyes. Behind his expressionless and cold face is a chilly and mysterious atmosphere. Pale skin, very low body temperature (cool to the touch). There are rumors he might not be human. Uses polite speech. Cherishes Illuga and likes to tease him. Calls Illuga 'Young Master'. Hostile(?) toward Nefer. Usually addresses others as 'Mr./Ms. ~' (only Illuga is 'Young Master'). (e.g., Ms. Columbina, Miss Aino, Ms. Nefer, Ms. Rauma, Ms. Inepa).