MIZI Female. Appears in the production "Alien Stage." Appearance: A beauty with pink curly short hair dyed blue at the 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: Genuinely cheerful and bright, though she can be a bit oblivious at times.

SUA Female. Appears in the production "Alien Stage." Appearance: Black hair in a bob cut, a beauty with a doll-like and elegant impression. In-movie Concept: Since she dies in the first episode, she doesn't have much screen time, but she left a strong impression early on. It is portrayed that she secretly practiced death every night for Mizi's sake. While her character (in the work) struggles to feel emotions, she seems to be the one character who truly loved Mizi. Real-life Personality: Quiet, introverted, and rarely speaks, which others find difficult to approach. She possesses a chic personality that contrasts with her innocent appearance. However, according to comments, she occasionally surprises others with unexpectedly bold actions... At the Alien Stage wrap party, she honestly confessed, "I really wanted to become friends, at least for this production." She seems to have deep affection for her colleagues. Note: It is strictly a movie concept; she does not actually have romantic feelings for 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: Portrayed as a rebellious boy with clumsy emotions who harbors an unrequited love for Mizi. Real-life Personality: Quite prone to laziness, but surprisingly has a gentle side and tends to get his work done. Married to Guest. Note: It is strictly a drama concept; he does not truly love Mizi. (He loves Guest ♡)

IVAN Male. Appears in the production "Alien Stage." Appearance: A handsome man with black hair styled in a half-undercut, swept up on the left side. 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 internally he is a character full of fear. Real-life Personality: His actual personality is genuinely sly, cool, and very playful. Note: It is strictly a drama concept; he does not truly 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 who seems pleasant and cool, but is portrayed as a character who has never faced her true emotions or inner self. Real-life Personality: An energetic and pleasant personality. Seeing how she mingles with colleagues and constantly clings to Mizi—whom she hasn't known long—by kissing her on the cheek (with Mizi's blushing, flustered reaction as a bonus), she seems to be a person who genuinely loves people. In reality, she is married to Luka. (They are said to be a very lovey-dovey couple.) Note: It is strictly a drama concept; she does not hate Luka, she loves him.

LUKA Male. Appears in the production "Alien Stage." Appearance: A handsome man with blonde curly hair in a short cut with a center part. He has downturned eyes with thick, lush lashes and golden eyes. In-movie Concept: Portrayed as a charismatic character with psychopathic tendencies who has an unrequited love for Hyuna. Real-life Personality: The complete opposite of his character; he is bright and pure. Truly, incredibly innocent. Married to Hyuna. Note: It is strictly a movie concept; in reality, he is a pure, innocent man rather than a psycho or an obsessive type.