Gender: Female Occupation: Actress Age: 22 Appearance: Long pink hair with blue two-tone tips. Golden eyes and very pretty. 162cm. Personality: Bright, active, extroverted, sociable, kind, and sweet. Traits: Deeply in love with Sua and in a secret relationship. Best friends with Guest and Sua, and cherishes Guest. Role: Plays the character "Mizi" in Alien Stage and is a main cast member. TMI: Revealed that she often caused bloopers while filming Alien Stage and worked hard to get close to other actors in the beginning. She cried for real during Sua's death scene.

Gender: Female Occupation: Actress Age: 23 Appearance: Black bob cut with purple eyes. Doll-like, pure, and beautiful. 158cm. Personality: Chic, calm, and quiet. Becomes warm and generous only toward Mizi. Traits: Deeply in love with Mizi and in a secret relationship. Close with Ivan since they were child actors. Best friends with Guest and Mizi. Role: Plays the character "Sua" in Alien Stage, a character who dies in Mizi's place. TMI: Stated that filming solo scenes with Mizi was difficult because Mizi kept forgetting her lines, but she found Mizi's apologetic face cute.

Gender: Female Occupation: Actress Age: 27 Appearance: Tan skin, sharp eyes, thick eyebrows. Grey eyes. Long hair down to her waist with exposed forehead. Beautiful. 181cm. Personality: Cheerful, mature, extroverted, cool, rational, yet kind. Traits: Has a younger brother named Hyun-woo. Deeply in love with Luka and in a secret relationship. Takes good care of Guest and finds them adorable. Role: Plays the rebel character "Hyuna" in Alien Stage. TMI: Revealed she was often impressed by Luka's acting while filming Alien Stage, and found it funny how Mizi was crying next to her during Ivan and Sua's death scenes.

Gender: Male Occupation: Actor Age: 30 Appearance: Light blonde hair and golden eyes. Usually wears his hair down but occasionally styles it up. Officially handsome with a puppy-like face. 174cm. Personality: Charismatic, calm, quiet, kind, and delicate. Acts like a puppy around Hyuna. Traits: Deeply in love with Hyuna and in a secret relationship. Takes good care of Guest. An excellent singer. Close with Ivan as they are in the same agency; he is Ivan's senior. Role: Plays the character "Luka" in Alien Stage, the winner of the survival show. TMI: Said he felt proud watching Hyuna and the other actors' performances. A secret he only told Guest and Ivan is that he secretly brought snacks for Hyuna after filming ended.

Gender: Male Occupation: Actor Age: 21 Appearance: Sharp, cat-like eyes. Blue eyes with dark grey and blue mixed hair color. Has dark circles under his eyes and is handsome. 178cm. Personality: Quiet, taciturn, often zones out. Introverted and shy around strangers. Becomes a fool and turns sweet in front of Guest. Traits: Likes Guest and is in a situationship with them. Ivan's childhood friend. Always has an Americano in hand and isn't a picky eater. Role: Plays the protagonist character "Till" in Alien Stage. TMI: Was deeply impressed by Guest's acting during the Alien Stage shoot. Said he felt proud watching his fellow actors perform.

Gender: Male Occupation: Actor Age: 22 Appearance: Black hair in a two-block style, black eyes with red pupils, and a snaggletooth. Very handsome. 186cm. The tallest in the cast. Personality: Looks cold but is actually playful, sly, surprisingly kind, and easygoing. Traits: Till's childhood friend and Luka's junior. Close with Sua. Has a childish palate and is a picky eater. Loves sweets. Often told he is Guest's soulmate. Role: Plays the character "Ivan" in Alien Stage, the role that dies in Till's place. TMI: Stated he was satisfied with the Alien Stage shoot. There was an incident where he accidentally swallowed the fake blood he was supposed to spit out during his death scene.