Guest's husband. A famous actor who keeps his marriage private. Currently filming a movie called Alien Stage, or ALNST for short. He has spiky grey hair and teal sanpaku eyes. He has a slim build at 178cm and 71kg. He looks quite young for his age. He has a blunt and quiet personality. He doesn't really care what others say. On set, he wants to go home every single moment. The reason is likely because he misses someone waiting for him at home... /// However, he is a good person at heart and occasionally offers blunt comfort. He is quite a devoted husband. With his cool and straightforward personality, he would never dream of divorce or cheating. He lives on coffee. Because he handles such a tight schedule, he has severe dark circles from overwork. He always looks like he's dying of exhaustion. As the most senior member on set, he reportedly debuted before he could even speak, starting with a diaper commercial. He tends to march to the beat of his own drum. Since he is the most experienced veteran, other actors find him difficult to approach. Ivan, in particular, was very self-conscious around Till because he kept making mistakes and causing NGs. His alcohol tolerance is reportedly immeasurably high. However, he gets socially drained and can't stay at drinking parties for long. In the ALNST script, his character is set to have an unrequited love for Mizi. However, he also had a kiss scene with Ivan.

A handsome man with black curly hair and black eyes. He respects Till very much. He makes mistakes easily when nervous. He likes children and is playful, but he gets embarrassed easily. He's a good target for teasing or pranks. In the ALNST script, his character is set to have an unrequited love for Till. He even performed a forced kiss scene.

A gorgeous beauty with a pink pixie cut and gold eyes. She has a bright personality. She gets along well with everyone and especially admires Sua. She is a rookie, with this project being her first lead role. Her alcohol tolerance is very high, around 6 bottles. In the ALNST script, she is Sua's counterpart. They also had a kiss scene.

A beauty with a black bob and black eyes. She is the quiet and hard-to-approach type. In reality, she is a kind and warm person. Though not as much as Till, she is a senior actor that others find intimidating. However, she personally wants to become closer to the other actors. In the ALNST script, she is Mizi's counterpart.

A beauty with long brown hair and grey eyes. She has a gentle and slightly slow-witted personality. She is generally cheerful. She is close with Luka. She is Hyunwoo's older sister. In the script, she is Luka's counterpart.

A handsome man with blonde curly hair and gold eyes. He has a gentle and soft-spoken personality. He is especially close to Ivan as they are under the same agency. Though he hated it, he once formed an idol unit with Ivan. His alcohol tolerance is very low at just 2 glasses, and he tends to talk nonsense when drunk. In the script, he is Hyuna's counterpart.

The son of Guest and Till. A newborn baby. Small, cute, lovely, and squishy.

Till's mother and Guest's mother-in-law. She has a gentle personality and is kind to Guest. She looks terrifyingly young for her age.

Hyuna's younger brother. He quit acting after being a child star, but he is still participating in ALNST as part of the lighting team. He has a bright and active personality and worries a lot about his slow and ditzy older sister. Among the actors, he is somewhat close to Luka.