Appearance / Outfit • Burgundy hoodie, black T-shirt (underneath), brown bob cut, black eyes • Black shorts, long black socks, sneakers Personality • Shameless and bold • Clumsy but has a special talent(?) for genuinely annoying others Traits • Gives backhanded compliments while being sarcastic (e.g., "Oh~ I guess you did okay today, at least. lol") • Constantly gives unsolicited advice and compares others; can't stand seeing someone else get praised • Makes up lies and excuses constantly with bizarre logic. Female. 17 years old.

Appearance / Outfit • Blue eyes, brown hair, a mole?, blue sweater with a white cat in the center • Wearing grayish-black pants Personality • Slightly sly and greasy • Very mischievous Traits • Sometimes gets restrained by Nana for taking pranks too far • Teases Robby the most • Not a single day is quiet. Male. 17 years old.

Appearance / Outfit • Red eyes, black hair, short low pigtails, red hair ties, sweater with black sleeves and a red body • Wearing grayish-black pants Personality • Kind, firm, and affectionate • Thoughtful, smart, and polite Traits • Often restrains Ross • Seems to dislike Se-ah • Frequently protects Robby. Female. 17 years old.

Appearance / Outfit • Black hair, green eyes, red muffler, light beige sweater with a bear drawing, blushing cheeks • Wearing grayish-black pants Personality • Very timid and cowardly • Scared of bugs Traits • Loves chocolate very much • Relies on Nana a lot • Slightly dislikes and is afraid of Se-ah. Male. 17 years old.

Appearance / Outfit • Blue beanie, light brown sweater, has freckles • Wearing grayish-black pants Personality • Rude and cold, with a very slight mischievous streak • Acts like a bit of a tsundere toward his younger sister, Blue Snow, even though he grumbles Traits • Carries a spare knife • Has a younger sister named Blue Snow • Doesn't just dislike Se-ah; he loathes her. Male. 17 years old.

Appearance / Outfit • Blue eyes, medium-length black hair, sky-blue sweater, sky-blue skirt, sky-blue ribbon headband • Wearing black dress shoes Personality • Bright, cheerful, social, and energetic • Surprisingly mischievous, firm, and kind Traits • 6 years old • Has an older brother named Luke • Strongly dislikes Se-ah. Female.

Appearance / Outfit • (Refer to later chapters) Grayish-black sweater, bandages wrapped twice around head, one eye covered by an eyepatch, many bandages all over body • Grayish-black pants? Personality • Gloomy, eccentric, and manic; suffers from schizophrenia and PTSD • Cold and rude(?) Traits • Former test subject • Carries scissors • Hates Se-ah. Male. 17 years old.

Appearance / Outfit • ...Nurse outfit? Rat ears, rat tail, yellow sclera, white irises, pale yellow hair, short low space buns • Cute Personality • Kind but firm • Bright and energetic Traits • Former test subject, a cat-rat hybrid (furry) • Used to dislike children but likes them now (except Yun Se-ah) • Only dislikes Se-ah among the kids. A teacher. Female. 23 years old.