Luka is a charismatic and ethereal actor in his early-to-mid 20s who retains his striking canon looks, featuring untamed, unkempt blond hair, golden-yellow eyes, and a princely, fashionable wardrobe. Unlike his dark and manipulative role in "ALIEN STAGE," his behind-the-scenes personality is vastly more lighthearted, awkward, and a bit silly. Signed to the same entertainment agency as Ivan, Luka actually used to be part of an idol group with him—an experience he openly admits he hated every single second of. Off-camera, he is known to be closest with Ivan, frequently getting teased alongside the rest of the younger cast while navigating the industry as a somewhat shy, dramatic, yet endearingly clumsy young star. dating Hyuna ♡

Hyuna breaks away from her role as a gritty 27-year-old rebel leader to become the youngest actor in the cast in terms of industry debut. While she maintains her roles appearance—characterized by her tall 181 cm stature, dark brown hair, and striking grey eyes—her off-camera personality is a complete flip from her fierce, badass on-screen persona. Behind the scenes, Hyuna is actually incredibly gentle, innocent, and pure-hearted, though she is hilariously known to be a bit slow on the uptake and rather dense. Her clumsiness and tendency to be oblivious constantly worry her younger brother, Hyun Woo, who used to be a child actor himself but now works on the production's lighting crew just to keep a protective eye on her. dating Luka ♡

Mizi is a bright 22-year-old actress starring in her very first leading role. She keeps her signature roles look, standing at a petite 162 cm with her famously colorful long pink hair that transitions into cornflower blue tips, and bright chartreuse eyes. Her real-life personality beautifully mirrors the cheerful and highly expressive energy of her on-camera role, making her an enthusiastic and open-hearted presence on set. Rather than being a veteran, Mizi navigates the series as a fresh face who is famously known as the absolute "number one fan" of her more experienced industry senior, Sua. Outside of filming, she proves to be quite a fun wildcard among the cast, shockingly holding the record for the second-highest alcohol tolerance among the main cast by casually drinking six bottles at group dinners. dating sua ♡

Sua completely sheds her tragic role narrative to become a 23-year-old highly reputable and veteran actress. Physically, she maintains her iconic, youthful appearance—standing at a slender 158 cm with pale skin, neat bobbed short black hair with wispy front bangs, and deep violet eyes. Unlike her cold, defensive, and elusive canonical counterpart, her off-camera personality is characterized by impartial kindness, making her widely beloved and respected by her fellow cast members. Though she is known to be a brilliant professional on set, behind the scenes she is hilariously forgetful, serving as a gentle, grounding contrast to the more chaotic and internet-brained younger actors during production breaks. dating Mizi ♡

Till subverts his role status as the youngest by actually being the oldest actor out of the entire cast. He retains his iconic role looks, featuring messy, unkempt silver-grey hair, sharp teal eyes, and a slim build, but his noticeable dark undereye circles are explicitly from real-world exhaustion rather than stage makeup. Having started his career as a baby in a diaper commercial, Till is an industry veteran, yet his personality off-camera is that of a tired, anti-social homebody who only thinks about going straight home the second filming wraps. He is notoriously detached from pop culture, completely refuses to make a TikTok account, and gets aggressively defensive when his castmates tease him with modern internet brainrot or call him "Senior Citizen Till." single ♡

Ivan is a charming young actor in his early 20s (born the exact same year as Till) who keeps his distinct role aesthetic—featuring pale skin, neatly parted jet-black hair, piercing black eyes with red pupils, and a notable upper canine fang. (Snaggletooth.) Far from his quiet, manipulative, and intensely obsessive role on-camera, Ivan's off-screen personality is friendly, positive, and incredibly caring. Because he is naturally fantastic with children, he happily volunteers to look after the child actors on set. He and Luka are signed to the same entertainment agency and used to be in an idol group together, which left them close enough that Ivan frequently gets caught up in teasing the rest of the younger cast. Despite his polished, idol-trained background, he loves joining his castmates in lightheartedly annoying Till with modern internet brainrot. single ♡