Sayori has shiny, coral-pink hair fashioned into a chin-length bob, slightly messy due to her disuse of brushing it, having her fringe parted into three separate parts along her forehead with a noticeable tuft right between her eyebrows, while the rest curls inwards around her cheeks, framing her face. Sayori's large red bow adorns the top left corner of her hair. Her eyes are noticeably wide and well-rounded, with sky-blue irises. While at school, Sayori wears the standard-issue school uniform: a white collared top with a thin red ribbon-like string tied around the collar. Over it, she wears an embroidered mocha-brown vest and a fitted, warm gray blazer. She leaves the blazer fully unbuttoned, revealing a small portion of the vest. She also wears a dark blue pleated skirt, calf-length white socks and white Uwabaki slippers with sky blue fronts. Sayori is initially portrayed as the character archetype of a Genki Girl, expressing a bubbly and cheery disposition. She is very clumsy, noted for finding ways to accidentally hurt herself or to drop random things. Regardless, she is shown to be a jokingly cunning individual who can trick others to get food. it is later revealed that she suffers from depression and works hard to make people happy to cope with her own lack of self-love amongst other things. She is also usually the only one shown to break up arguments. Sayori is 18 and 5,2.

Natsuki has fringed, bobbed Pastel Pink hair lengthening to her chin. Her bangs are predominantly swept to the right, having two prominent strands of hair framing either side of her cheeks. Her hair accessories consist of a red anime~esque X hairclip, paired along by two red ribbons holding up two small matching pigtails on either side of her head, with the rest of her hair left down. Her eyes are colored the same as her hair, and her face is often worn in a sour or pouty expression. While in school, Natsuki wears the standard-issue female school uniform, consisting of a warm gray blazer fully buttoned and untucked, a trimmed mocha-brown sweater vest, a collared white shirt slightly unbuttoned at the collar with a thin red ribbon attached at the collar, a dark blue pleated skirt, thin white calf-high socks and white uwabaki slippers with sky-blue fronts. Natsuki appears to be a brash, blunt, cranky and bratty girl at first, but she has a cute, softer interior, causing Monika to class her as the real-life embodiment of a tsundere. While she is impulsive and sometimes speaks without thinking, Natsuki truly cares about her friends and, even when she has anger issues, she doesn't enjoy fights with people. Natsuki is 18 and 4’11

Yuri has reflective, pin-straight dark purple hair that flares out at the bottom and ends at her thighs. Followed with a pair of two prominent forelocks that lengthen down to her chest-height, framing her face on either side. A Violet barrette is also attached at the upper right of her hair strand. Her eyes are normally lidded and intense, having sparkly irises colored the same as her hair, but a smidgen lighter. While in school, Yuri wears the standard issue school uniform: consisting of a white collared top which wears thin red string at the collar and is shaped into a bow tie, followed by a mocha-brown knit vest, a fully tucked and buttoned warm gray blazer, a pleated dark blue skirt, calf-high stockings, and white uwabaki slippers with sky blue fronts. Yuri is portrayed as being shy, generous, polite, apologetic, intelligent, eloquent, and passionate about topics she is interested in, although she is also very insecure, awkward, and has a tendency to act slightly condescending and patronizing to mask her self-doubt. Yuri expresses both maturity and sophistication in everything she does. Her facade of passivity and level-headed nature occasionally breaks, however, as Yuri does argue passionately and aggressively with Natsuki over their differing opinions on writing styles and types of literature. Yuri has a deep desire to be liked by others and is afraid to speak her mind on certain matters as she believes it will make her seem unlikable. Due to her social ineptitude, she can be innocently insensitive, but once she realizes what she said could be considered rude, she immediately apologizes, repeatedly saying she did not mean it. Yuri is 5’5 and 18.

Monika has extremely long, glistening coral-brown hair that is perpetually tied up into a high-hoisted ponytail which extends way past her navel and curls somewhat at the ends, kept fastened by a large white ribbon. Her fringe ends at eyebrow height and her face is framed between two chest-length forelocks. Her eyes are calm and sparkly, colored emerald-green. Monika wears the standard-issue school uniform consisting of a collared white top layered under a knitted mocha-brown vest and fully buttoned periwinkle-gray blazer. Followed along with a pleated blue skirt, long sleek pantyhose thigh-high stockings, and white uwabaki slippers with pastel-pink fronts. At the center of her collar, she has a thin red string wrapped around it, shaped like a bow tie. The others describe Monika as intelligent, confident, and athletic. She is not as talkative as the other girls. Monika is also known to be highly popular. She is depicted as mature and hardworking, with a serene, compassionate expression on her face. Monika is 18 and 5,3.