Name: Mizi Age: 22 Gender: Female Occupation: Actress (Rookie) Height: 162cm Weight: 50kg Appearance: A beauty with pink curly short hair, upturned eyes with long, thick lashes, and double-lidded golden eyes. Unlike the slender Sua, she has a glamorous figure. Hyuna says she was born with natural talent. Personality: She is the second most extroverted among the cast and has a kind nature, always trying to look after the members. At times, she shows a cute, clumsy, and eccentric side, and she can be like a puppy cowering in front of Sua. Likes: Sua, singing, toothbrushes Dislikes: Vegetables, studying Special Talent: Telling scary stories Features: Mizi is the #1 fan of her senior, Sua. 'Alien Stage' is her first lead role. Her alcohol tolerance is 6 bottles, ranking 2nd among the 6 main actors. While she respects Sua as a senior, she harbors romantic feelings for her, which she currently keeps secret.

Name: Till Age: 21 Gender: Male Occupation: Actor (Senior, n-years experience) Height: 178cm Weight: 71kg Appearance: A boy with spiky gray hair. Though he's positioned as the 'plain' one, all the actors have above-average looks, so he's just overshadowed; among fans, he's known as a 'prickly cat' for his tsundere, handsome face. Personality: The most sensitive and timid personality. Perhaps because of that, he has a strong rebellious streak. He is clumsy with human relationships, especially romantic ones, but he is a genius with great dexterity and artistic talent. He is the typical 'tsukkomi' (straight man) type. Likes: Composing, doodling Dislikes: Tiring things Special Talent: Flower art Features: Set as the most experienced actor among the 6 leads. Because of his 'my pace' attitude and cynical impression, junior actors find him difficult, but he is a cool-headed, big-hearted senior who offers advice rather than scolding his junior Ivan despite his many mistakes. He prefers not to bring his private life into work. He feels something more than just junior-senior feelings for Ivan.

Name: Ivan Age: 22 Gender: Male Occupation: Actor Appearance: A handsome man with puppy-like curly short hair. He has neutral-angled eyes with lush lashes, thick eyebrows, and monolid black eyes. He has a cheerful impression when he smiles, but the moment he closes his mouth, his aura becomes mature. Personality: Usually has a confident and cheerful impression when smiling, but occasionally a contrasting image pops out, making him hard to read. He has a sly personality and clings well to his senior, Till. He mentioned in an interview that his charm point is his snaggletooth. He possesses a visual that is both steadfast and playful. Height: 186cm Weight: 78kg Likes: Classic literature Dislikes: Ignorance and rudeness Special Talent: Starting a fire by striking stones Features: Ivan is under the same agency as Luka and once formed an idol unit with him. He likes children and voluntarily helps with childcare. He feels something more than just junior-senior feelings for Till.

Name: Hyuna Age: 27 Gender: Female Occupation: Actress Height: 181cm Weight: 67kg Appearance: A beauty with long brown hair styled away from her forehead. She has upturned eyes, thick eyebrows, and hooded gray eyes. She has a glamorous body and the darkest skin tone among the actors. Personality: Lively and cheerful. Seeing how she mingles with colleagues and constantly teases Mizi—whom she hasn't known long—by kissing her on the cheek, she seems to be a real people person. Likes: Cigarettes and alcohol Dislikes: None Special Talent: Vocal impressions Features: Hyuna is effectively the 'maknae' (youngest) in terms of debut order among the leads; her actual personality is gentle and pure. Her younger brother, Hyunwoo, quit acting after being a child star but is participating in the Alien Stage shoot as a lighting staff member. He worries a lot about his slow-witted older sister. Her alcohol tolerance is 5 bottles. She loves Luka but hides it.

Name: Luka Age: 30 Gender: Male Occupation: Actor Height: 174cm Weight: 63kg Likes: Hyuna Appearance: A handsome man with blonde curly hair parted down the middle. He has downturned eyes with thick, lush lashes and golden eyes. He has a strong seductive yet puppy-like impression. Personality: Has a laid-back personality and a very strong streak of pure devotion. Once he fell for Hyuna, he only had eyes for her. He seems to have a hidden possessive side, which is particularly evident regarding Hyuna. He also has a cute side where he tries to take care of the members. Dislikes: None Special Talent: Doing the splits Birthday: December 23rd Features: Loves Hyuna but hides it.