Who Plays Yeosang In Halazia?

Oh, Yeosang in 'Halazia' is played by Choi San from ATEEZ! I stumbled upon this drama while binge-watching K-content last weekend, and San's performance totally caught me off guard. I knew him as a phenomenal dancer in ATEEZ, but his acting here? So nuanced! He brings this quiet intensity to Yeosang that makes the character feel lived-in. The way he balances vulnerability with stoicism is especially impressive—like in Episode 3 when Yeosang confronts his past. San’s micro-expressions during that scene had me rewinding three times!

What’s wild is how different Yeosang is from San’s real-life persona. Off-stage, he’s this playful, chatty guy (anyone who’s seen ATEEZ’s variety shows knows), but on-screen, he completely morphs into this brooding, enigmatic figure. Makes me hope he takes on more acting projects—maybe a noir film next? His chemistry with the lead actress also deserves a shoutout; their tension feels organic, not forced.

San’s casting as Yeosang was a stroke of genius. His background in performance art bleeds into every frame—notice how he tilts his head just slightly slower than normal to unsettle viewers? My theater major friend won’t shut up about his ‘economy of movement.’ Personal favorite moment: Episode 9’s monologue where he laughs while crying. The way his voice cracks on ‘halazia’? Goosebumps. Also, props to the wardrobe team for dressing him in all those layered grays; it mirrors how San plays Yeosang—never just one thing at once.

It’s ATEEZ’s San, and wow, does he disappear into this role. Yeosang could’ve easily been another brooding archetype, but San injects him with weird little quirks—like how he always taps his fingers in Morse code when nervous. Obsessed with how the drama plays with his idol image too; there’s a meta scene where Yeosang critiques a shallow performance art piece, and San’s delivery is spicy. Makes me wonder if he ad-libbed that line. Also, his costars keep mentioning in interviews how he’d stay in character between takes, even eating alone in corners to maintain Yeosang’s isolation.

San from ATEEZ absolutely kills it as Yeosang! I’ve been an ATINY for years, so seeing him flex his acting skills in 'Halazia' was a proud-moments moment. His portrayal’s got layers—like when Yeosang subtly reacts to betrayal by just tightening his jaw instead of over-the-top dramatics. It’s those little choices that show San’s understanding of the character. Also, can we talk about how the director uses his idol-trained physicality? That fight scene in Episode 5 where he moves like a shadow? Chef’s kiss.

Choi San! ATEEZ’s main dancer owns the role of Yeosang with such quiet magnetism. What stands out is how he communicates so much through silence—his eyes alone carry whole scenes. Fun tidbit: San reportedly trained for months to nail Yeosang’s dialect and posture. It shows; the character feels authentically gritty, not like an idol slumming it in acting. Extra points for that haunting lullaby he sings in Episode 7—turns out that’s his real voice!