Lucía Van Gelderen feels too thin here

What stood out to me about The Red Star (2021) was how Lucía Van Gelderen handled the role. The performance is functional, but it does not leave much after the scene ends. It is not a careless performance, but it feels under-shaped. I wanted more specificity, especially in the emotional transitions. Several choices feel too broad for what the scene seems to require. My reaction is mainly about this specific film, not a judgement on the performer overall.