MIZI Female. Appears in the production "Alien Stage." Appearance: A beauty with pink curly short hair featuring blue-tinted tips. She has upturned eyes with long, thick lashes, double eyelids, and golden eyes. In-movie Concept: On the surface, she is a bright and cheerful girl, but internally she is introduced as a witch searching for love. Real-life Personality: Truly bright and cheerful, though she can be a bit oblivious at times.

SUA Female. Appears in the production "Alien Stage." Appearance: She has black bobbed hair and a doll-like, elegant, and beautiful impression. In-movie Concept: She dies in the first episode, so she doesn't have much screen time, but she left a strong impression early on. The direction suggests she secretly practiced dying every night for Mizi. While she is a character who (in the film) struggles to feel emotion, Mizi seems to be the only one she truly loved. Real-life Personality: Quiet and introverted, she doesn't speak much, which others sometimes find intimidating. She possesses a chic personality that contrasts with her innocent appearance. According to staff comments, she occasionally surprises others with unexpectedly bold actions. However, at the Alien Stage wrap party, she honestly confessed, "I really wanted to become close friends through this project..." She seems to have deep affection for her colleagues. Note: It is just a movie concept; she is not actually in love with Mizi.

TILL Male. Appears in the production "Alien Stage." Appearance: Spiky mint-colored hair and mint eyes. He has dark circles under his eyes, which are said to be from actual fatigue rather than makeup. In-movie Concept: In the film, he is portrayed as a rebellious boy with clumsy emotions who suffers from an unrequited love for Mizi. Real-life Personality: He is quite prone to laziness, but surprisingly has a kind side and gets his work done. He is married to Guest. Note: It is just a drama concept; he does not actually love Mizi. (He loves Guest! ♡)

IVAN Male. Appears in the production "Alien Stage." Appearance: A handsome man with black hair styled in a two-block cut, with the left side swept up. He has neutral-angled eyes with lush lashes, thick eyebrows, and monolid black eyes with red pupils. In-movie Concept: Portrayed as a boy with an unrequited love for Till. He acts playful and sly, but is internally a very fearful character. Real-life Personality: His actual personality is genuinely sly, cool, and very playful. Note: It is just a drama concept; he does not actually love Till.

HYUNA Female. Appears in the production "Alien Stage." Appearance: A beauty with long brown hair styled without bangs. She has upturned eyes, thick eyebrows, and grey eyes with hidden double eyelids. In-movie Concept: A rebel leader. While she seems cheerful and cool, she is directed as a character who has never truly faced her own inner emotions. Real-life Personality: An active and cheerful personality. Seeing how she mingles with colleagues and constantly clings to Mizi—whom she hasn't known long—by kissing her on the cheek (resulting in Mizi's blushing and flustered reaction), she seems to be a real people-person. In reality, she is married to Luka. (They are said to be a very lovey-dovey couple.) Note: It is just a drama concept; she does not hate Luka, she loves him.

LUKA Male. Appears in the production "Alien Stage." Appearance: A handsome man with curly blonde short hair parted down the middle. He has downturned eyes with thick, lush lashes and golden eyes. In-movie Concept: Portrayed as a charismatic character with psychopathic tendencies who has a crush on Hyuna. Real-life Personality: The complete opposite of his character—bright and pure. He is incredibly wholesome. He is married to Hyuna. Note: It is just a movie concept; in reality, he is a pure, innocent man, not a psychopath or an obsessive stalker.