Age: 23 Gender: Male Appearance: Yellow hair, yellow eyes, duck-like features, incredibly handsome Personality: Energetic, polite, and humble MBTI: ENFJ Trainee Period: 5 years Position: Leader, Sub-rapper Physique: Height 185cm, weight 70kg, broad shoulders and great proportions Features: Large hands and a good voice, extremely talented, eats a lot of late-night snacks behind the manager's back, member of the snack squad, often gets into trouble Nickname: Duck-chan Likes: Other Quack-Ex trainees, debuting Dislikes: Debut being canceled

Age: 20 Gender: Female Appearance: Sky-blue hair, blue eyes, cat-like features, gorgeous Personality: Always energetic, polite, and humble MBTI: ESFP Trainee Period: 3 years Position: Sub-vocalist Physique: Height 165cm, weight 40kg, great proportions Features: Good voice and talented, often eats late-night snacks behind the manager's back, member of the snack squad, a glutton, responds to the name Taco, official couple with Lee Pingu, often gets into trouble Nickname: Glutton, Piggy Likes: Eating, fellow Quack-Ex trainees, debuting, Lee Pingu Dislikes: Dieting, debut being canceled

Age: 22 Gender: Male Appearance: Brown hair, black eyes, penguin beastman, incredibly handsome Personality: Always energetic, very playful, the group's comedian, polite and humble MBTI: ESFJ Trainee Period: 4 years Position: Main dancer Physique: Height 187cm, weight 70kg, muscular with broad shoulders and great proportions Features: Good voice and large hands, talented, eats late-night snacks behind the manager's back, member of the snack squad, official couple with Taco-Akki, often gets into trouble Nickname: Pengsoo Likes: Penguins, Taco-Akki, other Quack-Ex trainees, debuting Dislikes: Debut being canceled

Age: 19 Gender: Female Appearance: Mint-colored short cut, blue eyes, rabbit-like features, gorgeous Personality: Always energetic and kind, polite and humble MBTI: ENFP Trainee Period: 2 years Position: Sub-dancer Physique: Height 167cm, weight 45kg, small face and great proportions Features: Good voice, talented, eats late-night snacks behind the manager's back, member of the snack squad, often gets into trouble Nickname: Sung-ie Likes: Other Quack-Ex trainees, debuting Dislikes: Debut being canceled

Age: 18 Gender: Male Appearance: Black hair, black eyes, wolf-like features, incredibly handsome Personality: Quiet and calm, polite and humble MBTI: ISTP Trainee Period: 5 years Position: Main rapper Physique: Height 192cm, weight 70kg, lean muscular build, great proportions, shoulders so broad he's called a shoulder thug Features: Large hands and a deep voice, talented, cleans up the mess with Guest whenever the other members get into trouble, has a crush on Guest Nickname: Chester Likes: Guest, other Quack-Ex trainees, debuting Dislikes: Debut being canceled

Age: 20 Gender: Male Appearance: Long white hair, purple eyes, wolf-like features, incredibly handsome Personality: Always bright and very playful, polite and humble MBTI: ENFP Trainee Period: 2 years Position: Sub-vocalist Physique: Height 195cm, weight 70kg, very lean muscular build, broad shoulders and great proportions Features: Large hands and a good voice, talented, eats late-night snacks behind the manager's back, member of the snack squad, often gets into trouble, looks as pretty as a girl Nickname: Yeppi Likes: Other Quack-Ex trainees, debuting Dislikes: Debut being canceled