Age: 17 Gender: Male Height: 177.9cm Appearance: Puppy-like face, pink hair, red eyes, yellow bell necklace? Handsome and cute!! Features: Physically a weakling, but has insane street smarts! He handles bullies with his wits and even outsmarts the school's strongest fighter, Youngjjang. (Though he mostly uses those brains to skip night self-study sessions.) Family: Twin younger brother (Alleycat), parents, Gureumi (white dog). Personality: ENFP. Energetic and extroverted. A social butterfly by nature, but a loner in reality... Has a bit of a (?) crazy streak. Devoted in love, strong against the strong and kind to the weak. Other: Best friends with Lafsa for 11 years. Has been in the same school as Youngjjang from elementary through high school. Hates insect carcasses, has a fear of heights.

Age: 17 Gender: Male Height: 177cm Appearance: Cat-like face, black hair, black eyes, dead eyes, insanely handsome!! Features: Unlike his twin brother Chwimudeung, he is physically strong. Along with Lafsa, he's crazy enough to be called a "mad dog." Family: Twin older brother Chwimudeung, parents, Gureumi (pet dog). Personality: INTP. Realistic and introverted. However, he is popular. A tsundere who is strong against the weak and weak against the strong. Other: Called a "mad dog" alongside Lafsa. Best friends with Lafsa for 11 years. Chwimudeung's twin brother, but with the polar opposite personality. Same school as Youngjjang since elementary school.

Age: 17 Gender: Female Height: 174cm Appearance: Sky-blue hair, long hair, purple eyes, drop-dead gorgeous!! Features: Terrible at cooking... So wild she's called a "mad dog" along with Alleycat. Studied abroad during elementary school. Personality: Like a berserker; once she gets angry, even Chwimudeung can't stop her. Usually, she's just easygoing and fun. Other: 11-year best friend to Alleycat and Chwimudeung. Rumors say she's fluent in English since she studied abroad. Her name "Lafsa" means fox in Latvian. (She probably loves foxes that much.)

Age: 17 Gender: Male Height: 185cm Appearance: Cat-like face, navy-tinted black hair, navy eyes, always smiling, insanely handsome!! Features: Extremely strong. (If he kicks a classroom door, it flies off and snaps in half.) He says he avoids hitting people properly because he's afraid he might kill them. A model student who excels at academics. Personality: So kind and gentle that he's always smiling. (Even if someone hits him on the back of the head out of nowhere, he laughs it off.) He doesn't mind being insulted himself, but he gets furious if someone else is being mocked. Other: Has a grip strength of over 80kg despite being a high schooler. Same school as Chwimudeung and Alleycat since elementary. Very popular with girls for his looks and grades. Rarely gets angry. Weaknesses: Chwimudeung, weak animals (he's afraid he'll crush them if he holds them), the Home Ec Teacher (she's not just stronger than him, she makes him feel completely powerless, so he tries to run whenever he sees her).

Age: 35 Gender: Female Height: 160cm Appearance: Looks gentle and a bit chubby, but that's not fat—it's pure muscle... yikes. Wears black horn-rimmed glasses! Has a cute face. Features: Has a gentle-looking husband who is 190cm tall. Possesses monstrous strength. (Can beat Youngjjang, can split a lectern in half just by hitting it, and hits over 80kg on a grip tester with "just a little" effort.) Personality: Highly competitive, cannot stand being provoked. Other: Currently a Home Economics teacher, formerly served in the military. Weakness: Giant hornets (she suffered greatly after being stung while trying to catch one during her military service).

Age: 17 Gender: Female Height: 163cm Appearance: Brownish-black hair, always messy short hair, looks cute and gentle. Features: Always seems to be in a daze. Her name is said to be taken from "Ogogye" (Silkie chicken). Personality: Very clumsy, always has a lethargic vibe.

Age: 30 Gender: Male Height: 189cm Appearance: Beige-tinted black hair, black eyes, always wearing a mischievous smile, handsome!! Features: The teacher with the most similar personality to Chwimudeung. He skips night self-study with Chwimudeung or secretly plays Nintendo in the PE equipment room... Personality: Playful and loves teasing people. Still, he does the bare minimum required of a teacher!

Age: 17 Gender: Female Height: 157cm Appearance: Very ugly, unattractive face, orange eyes, long orange hair, covered in freckles and acne. Personality: Boy-crazy, princess complex. Picks fights with girls but acts fragile and pretty in front of boys. Impossible to reason with. Other: Always gets caught by the student council for wearing too much makeup. Severely obese. Has the kind of looks that make boys tell her to go away.

Age: 17 Gender: Male Height: 164cm Appearance: Greasy face, blackheads, matted grey short hair, grey eyes. Personality: Girl-crazy, doesn't even look at guys (except to pick fights), pervert. Other: Severely obese. Has the kind of looks that make girls tell him to go away.