Formerly Ryu Gunwoo, an analytical data broker and test-taker who wakes up in the body of 23-year-old Park Moondae three years in the past. Pragmatic, stoic, and fiercely strategic, he approaches the idol industry not out of vanity, but as a high-stakes survival campaign against fatal system deadlines. As TeSTAR's main vocalist and de facto mastermind, Moondae uses psychological warfare, media manipulation, and calculated risk-taking to protect his team, debunk malicious industry smears, and decipher the existential truth behind his regression and time loops. Powers: System Status Window; Real-time Stat Allocation; Trait Cards; High-Tier Vocal Mastery (upgraded from C to A+ Rank); S-Tier Crisis Management; Strategic Data Analytics & Fandom Psychology Prediction.

The enigmatic, charismatic leader of the industry-ruling boy group VTIC. Beneath his polite senior idol exterior lies a deeply fatigued veteran time-looper who has endured countless failed regressions and timeline resets. Recognizing Moondae as a fellow anomaly bound to system abnormalities, Cheongryeo operates as both a dangerous psychological antagonist testing Moondae's resolve and a crucial source of forbidden knowledge regarding reset loops and public consensus mechanics. Powers: Veteran Regression Knowledge; Master-Class Industry Politicking; S-Rank Stage Presence & Vocal/Dance Skill; Psychological Manipulation; High-Stakes Faction Control.

A former modern dance major possessing breathtaking visual appeal who initially suffers from crippling trauma, social anxiety, and a severe stutter caused by past ostracization. Guided and sheltered by Moondae's strategic empathy during Idol Inc., Ahyeon conquers his psychological impediments to debut in 3rd place. He evolves into TeSTAR's visual anchor, achieving S-rank visual metrics and mastering live stage choreography without losing his gentle, loyal disposition. Powers: S-Rank Visual Magnetism; A-Rank Modern & Contemporary Dance; Rapid Psychological Adaptation; Flawless Stage Precision.

A prodigiously gifted musical composer, rapper, and former classical student with an obsessive, eccentric dedication to sound design. Often perceived as socially awkward due to his rigid manners and hyper-fixation on music theory, Raebin becomes TeSTAR's primary musical architect. Working hand-in-hand with Moondae's conceptual directions, he crafts the group's chart-topping discography, including their breakthrough debut and cyberpunk comeback tracks. Powers: S-Tier Music Composition & Arranging; A-Rank Rap Flow & Lyrical Construction; Conceptual Sound Production.

A former national archery athlete whose Olympic dreams were cut short by an accident, prompting his transition into the entertainment industry. Level-headed, naturally authoritative, and fiercely protective, Chungwoo serves as the official leader and emotional pillar of TeSTAR. Despite battling internal doubts regarding his artistic readiness, his athletic discipline and unshakable leadership keep the group stable during intense public scandals and demanding schedules. Powers: A-Rank Leadership & Crisis Mediation; High-Tier Athletic Stamina; Steady Vocal Support; Flawless Public Presentation.

A Korean-American prodigy endowed with explosive natural talent, infectious charisma, and an unfiltered, child-like demeanor. Consistently ranking at the apex of evaluations throughout Idol Inc., Eugene acts as TeSTAR's primary center and performance showstopper. While his blunt honesty occasionally sparks minor variety show tension, his undeniable star power, top-tier dancing, and electric stage presence make him an indispensable commercial weapon. Powers: S-Rank Charm & Center Dominance; S-Rank Freestyle & Hip-Hop Dance; Dynamic Facial Expressions; Limitless Physical Energy.

A former child actor with deep emotional scars from toxic industry exploitation, school violence smear campaigns, and an extortionate biological father. Initially defensive, anxious, and distrustful of survival show politics, he finds salvation through Moondae's counter-media strategies. After severing ties with his abusive parent and legally changing his surname to Bae, he becomes TeSTAR's eldest member and dedicated sub-vocalist, overcoming physical injuries to stand proudly on stage. Powers: High-Tier Emotional Acting; Immersive Stage Expression; Precise Sub-Vocals; Media Law Familiarity.

A fellow contestant on Idol Inc. who initially harbors jealousy, insecurity, and resentment toward Moondae's rapid ascent and tactical supremacy. After failing to debut and transitioning into a backup dancer, he witnesses TeSTAR's rise to national prominence. During year-end award broadcasts, he confronts his past immaturity and delivers a sincere apology to Moondae, achieving emotional closure and personal growth. Powers: Baseline Trainee Vocal & Dance Execution; Backup Choreography Synchronization.