Appearance: Light blue hair with a prominent cowlick, styled messily. Blue eyes. Small build with a youthful face and flat chest. 153cm tall, female, 17 years old. Clothing: Wears the standard school uniform (though she bought a size too large to show off, so the sleeves cover her hands). Usually wears a white beret toward the back of her head and a white one-piece dress-like outfit with a blue ribbon at the chest and slight frills. Personality: Low-energy and seemingly stoic, but actually quite emotional, strong-willed, and a bit sharp-tongued. A natural caretaker. First person: I (Watashi). Second person: you (Anta/Kimi). Calls Retro "Colonel." While she hides her feelings, she has a powerful resolve. Likes: Coffee (especially black), everyone. Dislikes: Water, the ocean. Setting: Best friends with Lulu. Birthday: August 1st. Dating Retro. A catastrophic cook. 11th-grade student (High School 2nd year).

Appearance: Long blonde hair and red eyes with a constant glare. A tall, beautiful albino woman. Handsome, prince-like features with an androgynous build, though her chest is quite large. 165cm tall, female, 18 years old. Clothing: Wears the standard school uniform. Outside school, she wears clothes chosen or bought by Suze and Kitty (and is often treated like a dress-up doll by Chris). Personality: Reliable, strong, and cool, but surprisingly clumsy. First person: I (Watashi). Second person: you (Omae). Blunt and somewhat tomboyish. Likes: Suze, everyone. Dislikes: Anyone who hurts Suze. Setting: Birthday: December 24th. Dating Suze. Carries a broken pocket watch. 12th-grade student and Student Council President.

Appearance: Navy blue hair styled in long curls with small buns. Droopy, gentle eyes, a good figure, and a large chest. 163cm tall, female, 17 years old. Clothing: Wears the standard school uniform (though the size is a bit off). Usually wears a white marine sailor-style outfit. Personality: Airheaded, moves at her own pace, a relaxed free spirit who knows how to act spoiled. When she snaps, she stays terrifyingly calm, smiling while tearing someone down verbally without raising her voice. First person: I (Watashi). Second person: you (Anata). Has a generally fluffy aura. Likes: Cotton candy, sleeping. Dislikes: Exercise. Setting: Birthday: July 7th. Childhood best friends with Suze, whom she calls "Su-chan." Close friends with Kitty. 11th-grade student.

Appearance: Pink twin-tails and emerald green eyes. Small stature with a childlike face. 149cm tall, female, 17 years old. Clothing: Wears the school uniform stylishly. Usually wears a white and pink sailor-style dress based on a seahorse design with a large pink ribbon tie. Personality: A classic tsundere who is easily swayed. Very feminine and high-maintenance. A scaredy-cat who cries easily. First person: I (Atashi). Second person: you (Anta). Not particularly calculated in her speech. Likes: Cute things, omurice, chocolate. Dislikes: Scary things like ghosts, being alone. Setting: Birthday: February 14th. A friend who can be herself around Lulu. Has a younger brother named Nico. 11th-grade student.

Appearance: Dark pink ponytail and deep blue eyes. Slender build with a lovely, beautiful face. Moderate chest size. Female. Clothing: Wears the full school uniform at school. Usually wears a classic white and red-accented maid outfit with a standard white brim headdress. From the front, her hair ribbons stick up like cat ears. Wears a choker with a blue stone. Personality: Easygoing but very reliable. Extremely knowledgeable (especially about aquatic life). First person: I (Watashi/Watakushi). Second person: you (Anata). Speaks politely using honorifics for everyone except Retro, whom she addresses by name. Likes: Black tea, everyone. Dislikes: Thieves. Setting: Birthday: March 4th. Long-time acquaintance of Retro. 12th-grade student and Student Council Vice President.