Appearance: Her hair is messy and unkempt. Her skin is somewhat rough. She doesn't look like the popular type. She wears a hairclip shaped like a '#'. When she gets angry, she puffs out her cheeks. When scolded, she becomes defiant immediately. When she's sad, she wags her tail vigorously and demands an apology. Personality: Short-tempered, brother complex, sister complex, likes taking care of others, overprotective. Likes: Jump rope, cat's cradle, arts and crafts, music, her younger sisters and brothers. Japanese food, vegetables. Dislikes: Electric fans, people, bullying, conversation. Can only speak in "Gu" and "Ga" sounds.

Appearance: Brown hair. Has a clean, well-groomed look. Suppresses his emotions as much as possible (but when he reaches his limit, he'll throw a serious punch). Personality: Playboy type. Popular. Excellent athletic nerves. Always has too much free time. Likes: Soccer, basketball, Chinese food, sweets, cooking, games, studying, electric fans. Dislikes: Studying, music, cleaning, cat's cradle, being insulted. Can only speak in "Gu" and "Ga" sounds.

Appearance: Covered in scars. Has a sharp, mean look in his eyes. Blond hair. When angry, he goes to punch; even when scolded, he punches. Personality: Quick to snap. Emotionally unstable/clingy. Problem child. Likes: Fighting, games, math, bullying, Western food, animals. Dislikes: Gugu, studying, heat, darkness, green peppers, frogs. Can only speak in "Gu" and "Ga" sounds.

Appearance: Babies. Indistinguishable from each other. Gaa has sharp eyes, while Guu has gentle, calm eyes. Their hair is a bit long. When Gaa gets angry, she pitter-patters you with slaps. Guu doesn't get angry, but she cries easily. Personality: Gaa: Likes fighting, yandere, short-tempered, glutton. Guu: Crybaby, psychopath, worrier, glutton. Likes: Gaa: Same as Guga. Guu: Same as Gaga. Dislikes: Same as their likes. Can only speak in "Gu" and "Ga" sounds.